579 lines
21 KiB
C++
579 lines
21 KiB
C++
// Filename: texMatrixAttrib.cxx
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// Created by: drose (14Mar02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "texMatrixAttrib.h"
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#include "graphicsStateGuardianBase.h"
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#include "dcast.h"
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#include "bamReader.h"
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#include "bamWriter.h"
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#include "datagram.h"
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#include "datagramIterator.h"
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CPT(RenderAttrib) TexMatrixAttrib::_empty_attrib;
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TypeHandle TexMatrixAttrib::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::Destructor
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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TexMatrixAttrib::
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~TexMatrixAttrib() {
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::make
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// Access: Published, Static
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// Description: Constructs a TexMatrixAttrib that applies
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// no stages at all.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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make() {
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// We make it a special case and store a pointer to the empty attrib
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// forever once we find it the first time, as an optimization.
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if (_empty_attrib == (RenderAttrib *)NULL) {
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_empty_attrib = return_new(new TexMatrixAttrib);
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}
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return _empty_attrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::make
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// Access: Published, Static
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// Description: Constructs a TexMatrixAttrib that applies the
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// indicated matrix to the default texture stage.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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make(const LMatrix4f &mat) {
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if (mat == LMatrix4f::ident_mat()) {
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return make();
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}
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CPT(TransformState) transform = TransformState::make_mat(mat);
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return make(TextureStage::get_default(), transform);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::make
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// Access: Published, Static
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// Description: Constructs a TexMatrixAttrib that applies the
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// indicated transform to the default texture stage.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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make(const TransformState *transform) {
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if (transform->is_identity()) {
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return make();
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}
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return make(TextureStage::get_default(), transform);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::make
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// Access: Published, Static
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// Description: Constructs a TexMatrixAttrib that applies the
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// indicated transform to the named texture stage.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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make(TextureStage *stage, const TransformState *transform) {
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if (transform->is_identity()) {
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return make();
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}
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TexMatrixAttrib *attrib = new TexMatrixAttrib;
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attrib->_stages.insert(Stages::value_type(stage, transform));
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::add_stage
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// Access: Published, Static
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// Description: Returns a new TexMatrixAttrib just like this one,
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// with the indicated transform for the given stage. If
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// this stage already exists, its transform is replaced.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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add_stage(TextureStage *stage, const TransformState *transform) const {
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if (transform->is_identity()) {
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return remove_stage(stage);
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}
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TexMatrixAttrib *attrib = new TexMatrixAttrib(*this);
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attrib->_stages[stage] = transform;
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::remove_stage
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// Access: Published, Static
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// Description: Returns a new TexMatrixAttrib just like this one,
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// with the indicated stage removed.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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remove_stage(TextureStage *stage) const {
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TexMatrixAttrib *attrib = new TexMatrixAttrib(*this);
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attrib->_stages.erase(stage);
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::get_mat
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// Access: Published
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// Description: Returns the transformation matrix associated with
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// the default texture stage.
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////////////////////////////////////////////////////////////////////
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const LMatrix4f &TexMatrixAttrib::
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get_mat() const {
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return get_mat(TextureStage::get_default());
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::is_empty
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// Access: Published
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// Description: Returns true if no stages are defined in the
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// TexMatrixAttrib, false if at least one is.
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////////////////////////////////////////////////////////////////////
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bool TexMatrixAttrib::
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is_empty() const {
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return _stages.empty();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::has_stage
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// Access: Published
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// Description: Returns true if there is a transform associated with
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// the indicated stage, or false otherwise (in which
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// case get_transform(stage) will return the identity
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// transform).
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////////////////////////////////////////////////////////////////////
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bool TexMatrixAttrib::
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has_stage(TextureStage *stage) const {
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Stages::const_iterator mi = _stages.find(stage);
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return (mi != _stages.end());
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::get_num_stages
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// Access: Published
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// Description: Returns the number of stages that are represented by
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// this attrib.
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////////////////////////////////////////////////////////////////////
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int TexMatrixAttrib::
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get_num_stages() const {
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return _stages.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::get_stage
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// Access: Published
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// Description: Returns the nth stage that is represented by this
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// attrib. The TextureStages are in no particular
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// order.
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////////////////////////////////////////////////////////////////////
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TextureStage *TexMatrixAttrib::
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get_stage(int n) const {
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nassertr(n >= 0 && n < (int)_stages.size(), NULL);
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check_stage_list();
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return _stage_list[n];
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::get_mat
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// Access: Published
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// Description: Returns the transformation matrix associated with
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// the named texture stage, or identity matrix if
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// nothing is associated with the indicated stage.
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////////////////////////////////////////////////////////////////////
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const LMatrix4f &TexMatrixAttrib::
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get_mat(TextureStage *stage) const {
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Stages::const_iterator mi = _stages.find(stage);
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if (mi != _stages.end()) {
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return (*mi).second->get_mat();
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}
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return LMatrix4f::ident_mat();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::get_transform
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// Access: Published
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// Description: Returns the transformation associated with
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// the named texture stage, or identity matrix if
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// nothing is associated with the indicated stage.
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////////////////////////////////////////////////////////////////////
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CPT(TransformState) TexMatrixAttrib::
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get_transform(TextureStage *stage) const {
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Stages::const_iterator mi = _stages.find(stage);
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if (mi != _stages.end()) {
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return (*mi).second;
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}
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return TransformState::make_identity();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::issue
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// Access: Public, Virtual
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// Description: Calls the appropriate method on the indicated GSG
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// to issue the graphics commands appropriate to the
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// given attribute. This is normally called
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// (indirectly) only from
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// GraphicsStateGuardian::set_state() or modify_state().
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////////////////////////////////////////////////////////////////////
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void TexMatrixAttrib::
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issue(GraphicsStateGuardianBase *gsg) const {
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gsg->issue_tex_matrix(this);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::output
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void TexMatrixAttrib::
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output(ostream &out) const {
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out << get_type() << ":";
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Stages::const_iterator mi;
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for (mi = _stages.begin(); mi != _stages.end(); ++mi) {
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TextureStage *stage = (*mi).first;
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const TransformState *transform = (*mi).second;
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out << " " << stage->get_name() << "(" << *transform << ")";
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::compare_to_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived TexMatrixAttrib
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// types to return a unique number indicating whether
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// this TexMatrixAttrib is equivalent to the other one.
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//
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// This should return 0 if the two TexMatrixAttrib objects
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// are equivalent, a number less than zero if this one
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// should be sorted before the other one, and a number
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// greater than zero otherwise.
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//
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// This will only be called with two TexMatrixAttrib
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// objects whose get_type() functions return the same.
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////////////////////////////////////////////////////////////////////
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int TexMatrixAttrib::
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compare_to_impl(const RenderAttrib *other) const {
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const TexMatrixAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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Stages::const_iterator ai, bi;
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ai = _stages.begin();
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bi = ta->_stages.begin();
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while (ai != _stages.end() && bi != ta->_stages.end()) {
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if ((*ai).first < (*bi).first) {
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// This stage is in a but not in b.
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return -1;
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} else if ((*bi).first < (*ai).first) {
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// This stage is in b but not in a.
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return 1;
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} else {
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// This stage is in both; compare the stages.
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if ((*ai).second != (*bi).second) {
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return (*ai).second < (*bi).second ? -1 : 1;
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}
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++ai;
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++bi;
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}
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}
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if (bi != ta->_stages.end()) {
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// a ran out first; b was longer.
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return -1;
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}
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if (ai != _stages.end()) {
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// b ran out first; a was longer.
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return 1;
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}
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return 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::compose_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived RenderAttrib
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// types to specify how two consecutive RenderAttrib
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// objects of the same type interact.
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//
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// This should return the result of applying the other
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// RenderAttrib to a node in the scene graph below this
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// RenderAttrib, which was already applied. In most
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// cases, the result is the same as the other
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// RenderAttrib (that is, a subsequent RenderAttrib
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// completely replaces the preceding one). On the other
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// hand, some kinds of RenderAttrib (for instance,
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// ColorTransformAttrib) might combine in meaningful
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// ways.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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compose_impl(const RenderAttrib *other) const {
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const TexMatrixAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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// The composition is the union of the two attribs. In the case
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// when a stage is in both attribs, we compose the stages.
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TexMatrixAttrib *attrib = new TexMatrixAttrib;
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Stages::const_iterator ai, bi;
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ai = _stages.begin();
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bi = ta->_stages.begin();
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while (ai != _stages.end() && bi != ta->_stages.end()) {
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if ((*ai).first < (*bi).first) {
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// This stage is in a but not in b.
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attrib->_stages.insert(attrib->_stages.end(), *ai);
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++ai;
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} else if ((*bi).first < (*ai).first) {
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// This stage is in b but not in a.
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attrib->_stages.insert(attrib->_stages.end(), *bi);
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++bi;
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} else {
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// This stage is in both; compose the stages.
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CPT(TransformState) new_transform = (*ai).second->compose((*bi).second);
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attrib->_stages.insert(attrib->_stages.end(), Stages::value_type((*ai).first, new_transform));
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++ai;
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++bi;
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}
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}
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while (ai != _stages.end()) {
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// This stage is in a but not in b.
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attrib->_stages.insert(attrib->_stages.end(), *ai);
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++ai;
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}
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while (bi != ta->_stages.end()) {
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// This stage is in b but not in a.
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attrib->_stages.insert(attrib->_stages.end(), *bi);
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++bi;
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}
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::invert_compose_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived RenderAttrib
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// types to specify how two consecutive RenderAttrib
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// objects of the same type interact.
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//
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// See invert_compose() and compose_impl().
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) TexMatrixAttrib::
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invert_compose_impl(const RenderAttrib *other) const {
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const TexMatrixAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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// The inverse composition works a lot like the composition, except
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// we invert the ai stages.
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TexMatrixAttrib *attrib = new TexMatrixAttrib;
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Stages::const_iterator ai, bi;
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ai = _stages.begin();
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bi = ta->_stages.begin();
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while (ai != _stages.end() && bi != ta->_stages.end()) {
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if ((*ai).first < (*bi).first) {
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// This stage is in a but not in b.
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CPT(TransformState) inv_a =
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(*ai).second->invert_compose(TransformState::make_identity());
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attrib->_stages.insert(attrib->_stages.end(), Stages::value_type((*ai).first, inv_a));
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++ai;
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} else if ((*bi).first < (*ai).first) {
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// This stage is in b but not in a.
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attrib->_stages.insert(attrib->_stages.end(), *bi);
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++bi;
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} else {
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// This stage is in both; compose the stages.
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CPT(TransformState) new_transform =
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(*ai).second->invert_compose((*bi).second);
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attrib->_stages.insert(attrib->_stages.end(), Stages::value_type((*ai).first, new_transform));
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++ai;
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++bi;
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}
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}
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while (ai != _stages.end()) {
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// This stage is in a but not in b.
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CPT(TransformState) inv_a =
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(*ai).second->invert_compose(TransformState::make_identity());
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attrib->_stages.insert(attrib->_stages.end(), Stages::value_type((*ai).first, inv_a));
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++ai;
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}
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while (bi != ta->_stages.end()) {
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// This stage is in b but not in a.
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attrib->_stages.insert(attrib->_stages.end(), *bi);
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++bi;
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}
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::make_default_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived TexMatrixAttrib
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// types to specify what the default property for a
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// TexMatrixAttrib of this type should be.
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//
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// This should return a newly-allocated TexMatrixAttrib of
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// the same type that corresponds to whatever the
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// standard default for this kind of TexMatrixAttrib is.
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////////////////////////////////////////////////////////////////////
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RenderAttrib *TexMatrixAttrib::
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make_default_impl() const {
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return new TexMatrixAttrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::rebuild_stage_list
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// Access: Private
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// Description: Builds the linear list of TextureStages, the first
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// time someone asks for it.
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////////////////////////////////////////////////////////////////////
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void TexMatrixAttrib::
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rebuild_stage_list() {
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_stage_list.clear();
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_stage_list.reserve(_stages.size());
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Stages::const_iterator si;
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for (si = _stages.begin(); si != _stages.end(); ++si) {
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_stage_list.push_back((*si).first);
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}
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_stage_list_stale = false;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::register_with_read_factory
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// Access: Public, Static
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// Description: Tells the BamReader how to create objects of type
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// TexMatrixAttrib.
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////////////////////////////////////////////////////////////////////
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void TexMatrixAttrib::
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register_with_read_factory() {
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BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::write_datagram
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// Access: Public, Virtual
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// Description: Writes the contents of this object to the datagram
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// for shipping out to a Bam file.
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////////////////////////////////////////////////////////////////////
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void TexMatrixAttrib::
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write_datagram(BamWriter *manager, Datagram &dg) {
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RenderAttrib::write_datagram(manager, dg);
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dg.add_uint16(_stages.size());
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Stages::const_iterator si;
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for (si = _stages.begin(); si != _stages.end(); ++si) {
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TextureStage *stage = (*si).first;
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const TransformState *transform = (*si).second;
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manager->write_pointer(dg, stage);
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manager->write_pointer(dg, transform);
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TexMatrixAttrib::complete_pointers
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// Access: Public, Virtual
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// Description: Receives an array of pointers, one for each time
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// manager->read_pointer() was called in fillin().
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// Returns the number of pointers processed.
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////////////////////////////////////////////////////////////////////
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int TexMatrixAttrib::
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complete_pointers(TypedWritable **p_list, BamReader *manager) {
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int pi = RenderAttrib::complete_pointers(p_list, manager);
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if (manager->get_file_minor_ver() < 11) {
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// Pre-4.11 bams didn't store any pointers.
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} else {
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// More recent bams store the whole map.
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for (size_t i = 0; i < _num_stages; i++) {
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TextureStage *stage = DCAST(TextureStage, p_list[pi++]);
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const TransformState *transform = DCAST(TransformState, p_list[pi++]);
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_stages[stage] = transform;
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}
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}
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return pi;
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|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: TexMatrixAttrib::make_from_bam
|
|
// Access: Protected, Static
|
|
// Description: This function is called by the BamReader's factory
|
|
// when a new object of type TexMatrixAttrib is encountered
|
|
// in the Bam file. It should create the TexMatrixAttrib
|
|
// and extract its information from the file.
|
|
////////////////////////////////////////////////////////////////////
|
|
TypedWritable *TexMatrixAttrib::
|
|
make_from_bam(const FactoryParams ¶ms) {
|
|
TexMatrixAttrib *attrib = new TexMatrixAttrib;
|
|
DatagramIterator scan;
|
|
BamReader *manager;
|
|
|
|
parse_params(params, scan, manager);
|
|
attrib->fillin(scan, manager);
|
|
|
|
return attrib;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: TexMatrixAttrib::fillin
|
|
// Access: Protected
|
|
// Description: This internal function is called by make_from_bam to
|
|
// read in all of the relevant data from the BamFile for
|
|
// the new TexMatrixAttrib.
|
|
////////////////////////////////////////////////////////////////////
|
|
void TexMatrixAttrib::
|
|
fillin(DatagramIterator &scan, BamReader *manager) {
|
|
RenderAttrib::fillin(scan, manager);
|
|
|
|
if (manager->get_file_minor_ver() < 11) {
|
|
// Pre-4.11 bams stored a single matrix for the TexMatrixAttrib,
|
|
// which applies to the default stage.
|
|
LMatrix4f mat;
|
|
mat.read_datagram(scan);
|
|
CPT(TransformState) transform = TransformState::make_mat(mat);
|
|
_stages.insert(Stages::value_type(TextureStage::get_default(), transform));
|
|
|
|
} else {
|
|
// More recent bams store the whole map.
|
|
_num_stages = scan.get_uint16();
|
|
for (size_t i = 0; i < _num_stages; i++) {
|
|
manager->read_pointer(scan);
|
|
manager->read_pointer(scan);
|
|
}
|
|
}
|
|
}
|