Panda3D
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boxEmitter.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file boxEmitter.cxx
10 * @author charles
11 * @date 2000-06-22
12 */
13
14#include "boxEmitter.h"
15
16/**
17 * constructor
18 */
20BoxEmitter() :
22 _vmin.set(-0.5f, -0.5f, -0.5f);
23 _vmax.set( 0.5f, 0.5f, 0.5f);
24}
25
26/**
27 * copy constructor
28 */
30BoxEmitter(const BoxEmitter &copy) :
32 _vmin = copy._vmin;
33 _vmax = copy._vmax;
34}
35
36/**
37 * destructor
38 */
42
43/**
44 * copier
45 */
47make_copy() {
48 return new BoxEmitter(*this);
49}
50
51/**
52 * Generates a location for a new particle
53 */
54void BoxEmitter::
55assign_initial_position(LPoint3& pos) {
56 PN_stdfloat t_x = NORMALIZED_RAND();
57 PN_stdfloat t_y = NORMALIZED_RAND();
58 PN_stdfloat t_z = NORMALIZED_RAND();
59
60 LVector3 v_diff = _vmax - _vmin;
61
62 PN_stdfloat lerp_x = _vmin[0] + t_x * v_diff[0];
63 PN_stdfloat lerp_y = _vmin[1] + t_y * v_diff[1];
64 PN_stdfloat lerp_z = _vmin[2] + t_z * v_diff[2];
65
66 pos.set(lerp_x, lerp_y, lerp_z);
67}
68
69/**
70 * Generates a velocity for a new particle
71 */
72void BoxEmitter::
73assign_initial_velocity(LVector3& vel) {
74 vel.set(0,0,0);
75}
76
77/**
78 * Write a string representation of this instance to <out>.
79 */
81output(std::ostream &out) const {
82 #ifndef NDEBUG //[
83 out<<"BoxEmitter";
84 #endif //] NDEBUG
85}
86
87/**
88 * Write a string representation of this instance to <out>.
89 */
91write(std::ostream &out, int indent) const {
92 #ifndef NDEBUG //[
93 out.width(indent); out<<""; out<<"BoxEmitter:\n";
94 out.width(indent+2); out<<""; out<<"_vmin "<<_vmin<<"\n";
95 out.width(indent+2); out<<""; out<<"_vmax "<<_vmax<<"\n";
97 #endif //] NDEBUG
98}
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
virtual void write(std::ostream &out, int indent=0) const
Write a string representation of this instance to <out>.
Describes a voluminous box region in which particles are generated.
Definition boxEmitter.h:22
virtual void write(std::ostream &out, int indent=0) const
Write a string representation of this instance to <out>.
BoxEmitter()
constructor
virtual BaseParticleEmitter * make_copy()
copier
virtual ~BoxEmitter()
destructor
virtual void output(std::ostream &out) const
Write a string representation of this instance to <out>.
std::ostream & indent(std::ostream &out, int indent_level)
A handy function for doing text formatting.
Definition indent.cxx:20