103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
// Filename: rectangleEmitter.cxx
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// Created by: charles (22Jun00)
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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, 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://www.panda3d.org/license.txt .
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//
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// To contact the maintainers of this program write to
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// panda3d@yahoogroups.com .
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//
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////////////////////////////////////////////////////////////////////
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#include "rectangleEmitter.h"
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////////////////////////////////////////////////////////////////////
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// Function : RectangleEmitter
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// Access : Public
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// Description : constructor
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////////////////////////////////////////////////////////////////////
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RectangleEmitter::
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RectangleEmitter(void) :
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BaseParticleEmitter() {
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_vmin.set(-0.5f, -0.5f);
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_vmax.set( 0.5f, 0.5f);
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}
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////////////////////////////////////////////////////////////////////
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// Function : RectangleEmitter
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// Access : Public
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// Description : copy constructor
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////////////////////////////////////////////////////////////////////
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RectangleEmitter::
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RectangleEmitter(const RectangleEmitter ©) :
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BaseParticleEmitter(copy) {
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_vmin = copy._vmin;
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_vmax = copy._vmax;
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}
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////////////////////////////////////////////////////////////////////
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// Function : RectangleEmitter
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// Access : Public
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// Description : destructor
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////////////////////////////////////////////////////////////////////
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RectangleEmitter::
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~RectangleEmitter(void) {
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}
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////////////////////////////////////////////////////////////////////
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// Function : make_copy
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// Access : Public
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// Description : copier
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////////////////////////////////////////////////////////////////////
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BaseParticleEmitter *RectangleEmitter::
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make_copy(void) {
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return new RectangleEmitter(*this);
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}
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////////////////////////////////////////////////////////////////////
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// Function : RectangleEmitter::assign_initial_position
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// Access : Public
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// Description : Generates a location for a new particle
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////////////////////////////////////////////////////////////////////
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void RectangleEmitter::
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assign_initial_position(LPoint3f& pos) {
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float t_x = NORMALIZED_RAND();
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float t_y = NORMALIZED_RAND();
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LVector2f v_diff = _vmax - _vmin;
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float lerp_x = _vmin[0] + t_x * v_diff[0];
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float lerp_y = _vmin[1] + t_y * v_diff[1];
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pos.set(lerp_x, lerp_y, 0.0f);
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}
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////////////////////////////////////////////////////////////////////
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// Function : RectangleEmitter::assign_initial_velocity
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// Access : Public
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// Description : Generates a velocity for a new particle
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////////////////////////////////////////////////////////////////////
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void RectangleEmitter::
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assign_initial_velocity(LVector3f& vel) {
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vel.set(0.0f,0.0f,0.0f);
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}
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////////////////////////////////////////////////////////////////////
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// Function : output
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// Access : Public
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// Description : Write a string representation of this instance to
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// <out>.
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////////////////////////////////////////////////////////////////////
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void RectangleEmitter::
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output(ostream &out, unsigned int indent) const {
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out.width(indent); out<<""; out<<"RectangleEmitter:\n";
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BaseParticleEmitter::output(out, indent+2);
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}
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