Added light ramp attrib
This commit is contained in:
Josh Yelon
parent
92dd6d6e89
commit
f1ca9a02b3
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// Filename: lightRampAttrib.I
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// Created by: drose (04Mar02)
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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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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::Constructor
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// Access: Private
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// Description: Use LightRampAttrib::make() to construct a new
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// LightRampAttrib object.
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////////////////////////////////////////////////////////////////////
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INLINE LightRampAttrib::
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LightRampAttrib() {
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_mode = LRT_identity;
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_level[0] = 0.0;
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_level[1] = 0.0;
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_level[2] = 0.0;
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_threshold[0] = 0.0;
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_threshold[1] = 0.0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::get_mode
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// Access: Published
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// Description: Returns the LightRampAttrib mode.
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////////////////////////////////////////////////////////////////////
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INLINE LightRampAttrib::LightRampMode LightRampAttrib::
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get_mode() const {
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return _mode;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::get_level
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// Access: Published
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// Description: Returns the nth lighting level.
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////////////////////////////////////////////////////////////////////
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INLINE float LightRampAttrib::
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get_level(int n) const {
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if ((n<0)||(n>2)) return 0.0;
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return _level[n];
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::get_threshold
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// Access: Published
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// Description: Returns the nth threshold level.
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////////////////////////////////////////////////////////////////////
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INLINE float LightRampAttrib::
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get_threshold(int n) const {
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if ((n<0)||(n>1)) return 0.0;
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return _threshold[n];
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}
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// Filename: lightRampAttrib.cxx
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// Created by: drose (04Mar02)
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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 "lightRampAttrib.h"
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#include "attribSlots.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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TypeHandle LightRampAttrib::_type_handle;
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CPT(RenderAttrib) LightRampAttrib::_identity;
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::make_identity
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// Access: Published, Static
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// Description: Constructs a new LightRampAttrib object.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) LightRampAttrib::
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make_identity() {
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if (_identity == 0) {
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LightRampAttrib *attrib = new LightRampAttrib();
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_identity = return_new(attrib);
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}
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return _identity;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::make_single_threshold
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// Access: Published, Static
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// Description: Constructs a new LightRampAttrib object.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) LightRampAttrib::
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make_single_threshold(float val0, float val1, float thresh0) {
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LightRampAttrib *attrib = new LightRampAttrib();
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attrib->_mode = LRT_single_threshold;
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attrib->_level[0] = val0;
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attrib->_level[1] = val1;
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attrib->_threshold[0] = thresh0;
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::make_double_threshold
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// Access: Published, Static
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// Description: Constructs a new LightRampAttrib object.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) LightRampAttrib::
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make_double_threshold(float val0, float val1, float val2, float thresh0, float thresh1) {
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LightRampAttrib *attrib = new LightRampAttrib();
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attrib->_mode = LRT_single_threshold;
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attrib->_level[0] = val0;
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attrib->_level[1] = val1;
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attrib->_level[2] = val2;
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attrib->_threshold[0] = thresh0;
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attrib->_threshold[1] = thresh1;
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::output
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void LightRampAttrib::
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output(ostream &out) const {
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out << get_type() << ":";
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switch (_mode) {
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case LRT_identity:
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out << "identity()";
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break;
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case LRT_single_threshold:
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out << "single_threshold(" << _level[0] << "," << _level[1] << "," << _threshold[0] << ")";
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break;
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case LRT_double_threshold:
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out << "double_threshold(" << _level[0] << "," << _level[1] << "," << _level[2] << "," << _threshold[0] << "," << _threshold[0] << ")";
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break;
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::compare_to_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived LightRampAttrib
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// types to return a unique number indicating whether
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// this LightRampAttrib is equivalent to the other one.
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//
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// This should return 0 if the two LightRampAttrib 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 LightRampAttrib
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// objects whose get_type() functions return the same.
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////////////////////////////////////////////////////////////////////
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int LightRampAttrib::
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compare_to_impl(const RenderAttrib *other) const {
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const LightRampAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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int compare_result = ((int)_mode - (int)ta->_mode) ;
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if (compare_result!=0) {
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return compare_result;
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}
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for (int i=0; i<3; i++) {
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compare_result = _level[i] - ta->_level[i];
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if (compare_result!=0) {
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return compare_result;
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}
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}
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for (int i=0; i<2; i++) {
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compare_result = _threshold[i] - ta->_threshold[i];
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if (compare_result!=0) {
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return compare_result;
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}
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}
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return 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::make_default_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived LightRampAttrib
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// types to specify what the default property for a
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// LightRampAttrib of this type should be.
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//
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// This should return a newly-allocated LightRampAttrib of
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// the same type that corresponds to whatever the
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// standard default for this kind of LightRampAttrib is.
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////////////////////////////////////////////////////////////////////
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RenderAttrib *LightRampAttrib::
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make_default_impl() const {
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return new LightRampAttrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::store_into_slot
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// Access: Public, Virtual
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// Description: Stores this attrib into the appropriate slot of
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// an object of class AttribSlots.
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////////////////////////////////////////////////////////////////////
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void LightRampAttrib::
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store_into_slot(AttribSlots *slots) const {
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slots->_light_ramp = this;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::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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// LightRampAttrib.
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////////////////////////////////////////////////////////////////////
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void LightRampAttrib::
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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: LightRampAttrib::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 LightRampAttrib::
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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_int8(_mode);
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for (int i=0; i<3; i++) {
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dg.add_float32(_level[i]);
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}
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for (int i=0; i<2; i++) {
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dg.add_float32(_threshold[i]);
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::make_from_bam
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// Access: Protected, Static
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// Description: This function is called by the BamReader's factory
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// when a new object of type LightRampAttrib is encountered
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// in the Bam file. It should create the LightRampAttrib
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// and extract its information from the file.
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////////////////////////////////////////////////////////////////////
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TypedWritable *LightRampAttrib::
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make_from_bam(const FactoryParams ¶ms) {
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LightRampAttrib *attrib = new LightRampAttrib;
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DatagramIterator scan;
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BamReader *manager;
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parse_params(params, scan, manager);
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attrib->fillin(scan, manager);
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return attrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: LightRampAttrib::fillin
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// Access: Protected
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// Description: This internal function is called by make_from_bam to
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// read in all of the relevant data from the BamFile for
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// the new LightRampAttrib.
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////////////////////////////////////////////////////////////////////
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void LightRampAttrib::
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fillin(DatagramIterator &scan, BamReader *manager) {
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RenderAttrib::fillin(scan, manager);
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_mode = (LightRampMode)scan.get_int8();
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for (int i=0; i<3; i++) {
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_level[i] = scan.get_float32();
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}
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for (int i=0; i<2; i++) {
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_threshold[i] = scan.get_float32();
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}
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}
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@ -0,0 +1,100 @@
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// Filename: lightRampAttrib.h
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// Created by: drose (04Mar02)
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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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#ifndef LIGHTRAMPATTRIB_H
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#define LIGHTRAMPATTRIB_H
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#include "pandabase.h"
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#include "renderAttrib.h"
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class FactoryParams;
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////////////////////////////////////////////////////////////////////
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// Class : LightRampAttrib
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// Description : The LightRampAttrib alters the light level reaching
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// the surface of the model by applying a "ramp" function.
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// Typically, this is used for cartoon lighting, in which
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// case the ramp is a step-function.
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//
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// LightRampAttrib is relevant only when lighting and
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// shader generation are both enabled. Otherwise, it has
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// no effect.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PGRAPH LightRampAttrib : public RenderAttrib {
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private:
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INLINE LightRampAttrib();
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PUBLISHED:
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enum LightRampMode {
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LRT_identity,
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LRT_single_threshold,
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LRT_double_threshold,
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};
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static CPT(RenderAttrib) make_identity();
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static CPT(RenderAttrib) make_single_threshold(float lev0, float lev1, float thresh0);
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static CPT(RenderAttrib) make_double_threshold(float lev0, float lev1, float lev2, float thresh0, float thresh1);
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INLINE LightRampMode get_mode() const;
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INLINE float get_level(int n) const;
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INLINE float get_threshold(int n) const;
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public:
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virtual void output(ostream &out) const;
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virtual void store_into_slot(AttribSlots *slots) const;
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protected:
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virtual int compare_to_impl(const RenderAttrib *other) const;
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virtual RenderAttrib *make_default_impl() const;
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private:
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LightRampMode _mode;
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float _level[3];
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float _threshold[2];
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static CPT(RenderAttrib) LightRampAttrib::_identity;
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public:
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static void register_with_read_factory();
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virtual void write_datagram(BamWriter *manager, Datagram &dg);
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protected:
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static TypedWritable *make_from_bam(const FactoryParams ¶ms);
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void fillin(DatagramIterator &scan, BamReader *manager);
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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RenderAttrib::init_type();
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register_type(_type_handle, "LightRampAttrib",
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RenderAttrib::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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#include "lightRampAttrib.I"
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#endif
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