110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
// Filename: sphereSurfaceEmitter.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) 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 "sphereSurfaceEmitter.h"
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////////////////////////////////////////////////////////////////////
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// Function : SphereSurfaceEmitter
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// Access : Public
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// Description : constructor
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////////////////////////////////////////////////////////////////////
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SphereSurfaceEmitter::
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SphereSurfaceEmitter() {
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_radius = 1.0f;
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}
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////////////////////////////////////////////////////////////////////
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// Function : SphereSurfaceEmitter
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// Access : Public
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// Description : copy constructor
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////////////////////////////////////////////////////////////////////
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SphereSurfaceEmitter::
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SphereSurfaceEmitter(const SphereSurfaceEmitter ©) :
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BaseParticleEmitter(copy) {
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_radius = copy._radius;
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}
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////////////////////////////////////////////////////////////////////
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// Function : ~SphereSurfaceEmitter
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// Access : Public
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// Description : destructor
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////////////////////////////////////////////////////////////////////
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SphereSurfaceEmitter::
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~SphereSurfaceEmitter() {
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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 *SphereSurfaceEmitter::
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make_copy() {
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return new SphereSurfaceEmitter(*this);
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}
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////////////////////////////////////////////////////////////////////
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// Function : SphereSurfaceEmitter::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 SphereSurfaceEmitter::
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assign_initial_position(LPoint3& pos) {
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PN_stdfloat z, theta, r;
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z = SPREAD(_radius);
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r = sqrtf((_radius * _radius) - (z * z));
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theta = NORMALIZED_RAND() * 2.0f * MathNumbers::pi_f;
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pos.set(r * cosf(theta), r * sinf(theta), z);
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}
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////////////////////////////////////////////////////////////////////
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// Function : SphereSurfaceEmitter::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 SphereSurfaceEmitter::
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assign_initial_velocity(LVector3& vel) {
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vel.set(0,0,0);
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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 SphereSurfaceEmitter::
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output(ostream &out) const {
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#ifndef NDEBUG //[
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out<<"SphereSurfaceEmitter";
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#endif //] NDEBUG
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}
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////////////////////////////////////////////////////////////////////
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// Function : write
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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 SphereSurfaceEmitter::
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write(ostream &out, int indent) const {
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#ifndef NDEBUG //[
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out.width(indent); out<<""; out<<"SphereSurfaceEmitter:\n";
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out.width(indent+2); out<<""; out<<"_radius "<<_radius<<"\n";
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BaseParticleEmitter::write(out, indent+2);
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#endif //] NDEBUG
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}
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