176 lines
6.7 KiB
C++
176 lines
6.7 KiB
C++
// Filename: modelNode.cxx
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// Created by: drose (16Mar02)
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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) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#include "uvScrollNode.h"
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#include "bamReader.h"
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#include "datagram.h"
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#include "datagramIterator.h"
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#include "luse.h"
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#include "renderState.h"
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#include "texMatrixAttrib.h"
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#include "textureStage.h"
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#include "transformState.h"
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TypeHandle UvScrollNode::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: UvScrollNode::make_copy
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// Access: Public, Virtual
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// Description: Returns a newly-allocated Node that is a shallow copy
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// of this one. It will be a different Node pointer,
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// but its internal data may or may not be shared with
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// that of the original Node.
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////////////////////////////////////////////////////////////////////
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PandaNode *UvScrollNode::
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make_copy() const {
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return new UvScrollNode(*this);
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}
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////////////////////////////////////////////////////////////////////
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// Function: UvSctrollNode::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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// UvScrollNode.
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////////////////////////////////////////////////////////////////////
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void UvScrollNode::
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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: UvSctrollNode::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 UvScrollNode::
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write_datagram(BamWriter *manager, Datagram &dg) {
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PandaNode::write_datagram(manager, dg);
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dg.add_stdfloat(_u_speed);
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dg.add_stdfloat(_v_speed);
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dg.add_stdfloat(_w_speed);
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dg.add_stdfloat(_r_speed);
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}
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////////////////////////////////////////////////////////////////////
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// Function: ModelNode::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 ModelNode is encountered
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// in the Bam file. It should create the ModelNode
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// and extract its information from the file.
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////////////////////////////////////////////////////////////////////
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TypedWritable *UvScrollNode::
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make_from_bam(const FactoryParams ¶ms) {
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UvScrollNode *node = new UvScrollNode("");
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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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node->fillin(scan, manager);
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return node;
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}
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////////////////////////////////////////////////////////////////////
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// Function: ModelNode::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 ModelNode.
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////////////////////////////////////////////////////////////////////
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void UvScrollNode::
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fillin(DatagramIterator &scan, BamReader *manager) {
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PandaNode::fillin(scan, manager);
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_u_speed = scan.get_stdfloat();
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_v_speed = scan.get_stdfloat();
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if (manager->get_file_minor_ver() >= 33) {
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_w_speed = scan.get_stdfloat();
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}
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if (manager->get_file_minor_ver() >= 22) {
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_r_speed = scan.get_stdfloat();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: SequenceNode::cull_callback
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// Access: Public, Virtual
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// Description: This function will be called during the cull
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// traversal to perform any additional operations that
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// should be performed at cull time. This may include
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// additional manipulation of render state or additional
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// visible/invisible decisions, or any other arbitrary
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// operation.
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//
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// Note that this function will *not* be called unless
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// set_cull_callback() is called in the constructor of
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// the derived class. It is necessary to call
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// set_cull_callback() to indicated that we require
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// cull_callback() to be called.
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//
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// By the time this function is called, the node has
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// already passed the bounding-volume test for the
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// viewing frustum, and the node's transform and state
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// have already been applied to the indicated
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// CullTraverserData object.
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//
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// The return value is \true if this node should be
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// visible, or false if it should be culled.
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////////////////////////////////////////////////////////////////////
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bool UvScrollNode::
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cull_callback(CullTraverser * trav, CullTraverserData &data) {
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double elapsed = ClockObject::get_global_clock()->get_frame_time() - _start_time;
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CPT(TransformState) ts = TransformState::make_pos_hpr(
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LVecBase3(cmod(elapsed * _u_speed, 1.0) / 1.0,
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cmod(elapsed * _v_speed, 1.0) / 1.0,
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cmod(elapsed * _w_speed, 1.0) / 1.0),
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LVecBase3((cmod(elapsed * _r_speed, 1.0) / 1.0) * 360, 0, 0));
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CPT(RenderAttrib) tm = TexMatrixAttrib::make(TextureStage::get_default(), ts);
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CPT(RenderState) rs = RenderState::make_empty()->set_attrib(tm);
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data._state = data._state->compose(rs);
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return true;
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}
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////////////////////////////////////////////////////////////////////
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// Function: UvScrollNode::safe_to_flatten
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// Access: Public, Virtual
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// Description: Returns true if it is generally safe to flatten out
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// this particular kind of PandaNode by duplicating
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// instances (by calling dupe_for_flatten()), false
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// otherwise (for instance, a Camera cannot be safely
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// flattened, because the Camera pointer itself is
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// meaningful).
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////////////////////////////////////////////////////////////////////
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bool UvScrollNode::
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safe_to_flatten() const {
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return false;
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}
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////////////////////////////////////////////////////////////////////
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// Function: UvScrollNode::safe_to_combine
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// Access: Public, Virtual
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// Description: Returns true if it is generally safe to combine this
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// with other nodes, which it isn't, so don't. Ever.
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////////////////////////////////////////////////////////////////////
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bool UvScrollNode::
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safe_to_combine() const {
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return false;
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}
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