Panda3D

rectangleEmitter.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 rectangleEmitter.cxx
10 * @author charles
11 * @date 2000-06-22
12 */
13
14 #include "rectangleEmitter.h"
15
16 /**
17 * constructor
18 */
19 RectangleEmitter::
20 RectangleEmitter() :
21 BaseParticleEmitter() {
22 _vmin.set(-0.5f, -0.5f);
23 _vmax.set( 0.5f, 0.5f);
24 }
25
26 /**
27 * copy constructor
28 */
29 RectangleEmitter::
30 RectangleEmitter(const RectangleEmitter &copy) :
31 BaseParticleEmitter(copy) {
32 _vmin = copy._vmin;
33 _vmax = copy._vmax;
34 }
35
36 /**
37 * destructor
38 */
39 RectangleEmitter::
40 ~RectangleEmitter() {
41 }
42
43 /**
44 * copier
45 */
46 BaseParticleEmitter *RectangleEmitter::
47 make_copy() {
48 return new RectangleEmitter(*this);
49 }
50
51 /**
52 * Generates a location for a new particle
53 */
54 void RectangleEmitter::
55 assign_initial_position(LPoint3& pos) {
56 PN_stdfloat t_x = NORMALIZED_RAND();
57 PN_stdfloat t_y = NORMALIZED_RAND();
58
59 LVector2 v_diff = _vmax - _vmin;
60
61 PN_stdfloat lerp_x = _vmin[0] + t_x * v_diff[0];
62 PN_stdfloat lerp_y = _vmin[1] + t_y * v_diff[1];
63
64 pos.set(lerp_x, lerp_y, 0.0f);
65 }
66
67 /**
68 * Generates a velocity for a new particle
69 */
70 void RectangleEmitter::
71 assign_initial_velocity(LVector3& vel) {
72 vel.set(0.0f,0.0f,0.0f);
73 }
74
75 /**
76 * Write a string representation of this instance to <out>.
77 */
78 void RectangleEmitter::
79 output(std::ostream &out) const {
80 #ifndef NDEBUG //[
81 out<<"RectangleEmitter";
82 #endif //] NDEBUG
83 }
84
85 /**
86 * Write a string representation of this instance to <out>.
87 */
88 void RectangleEmitter::
89 write(std::ostream &out, int indent) const {
90 #ifndef NDEBUG //[
91 out.width(indent); out<<""; out<<"RectangleEmitter:\n";
92 out.width(indent+2); out<<""; out<<"_vmin "<<_vmin<<"\n";
93 out.width(indent+2); out<<""; out<<"_vmax "<<_vmax<<"\n";
94 BaseParticleEmitter::write(out, indent+2);
95 #endif //] NDEBUG
96 }
BaseParticleEmitter
Definition: baseParticleEmitter.h:25
BaseParticleEmitter::write
virtual void write(std::ostream &out, int indent=0) const
Write a string representation of this instance to <out>.
Definition: baseParticleEmitter.cxx:92
RectangleEmitter
Describes a planar square region in which particles are generated.
Definition: rectangleEmitter.h:22
RectangleEmitter::output
virtual void output(std::ostream &out) const
Write a string representation of this instance to <out>.
Definition: rectangleEmitter.cxx:79
RectangleEmitter::write
virtual void write(std::ostream &out, int indent=0) const
Write a string representation of this instance to <out>.
Definition: rectangleEmitter.cxx:89
RectangleEmitter::RectangleEmitter
RectangleEmitter()
constructor
Definition: rectangleEmitter.cxx:20
RectangleEmitter::make_copy
virtual BaseParticleEmitter * make_copy()
copier
Definition: rectangleEmitter.cxx:47
RectangleEmitter::~RectangleEmitter
virtual ~RectangleEmitter()
destructor
Definition: rectangleEmitter.cxx:40
indent
std::ostream & indent(std::ostream &out, int indent_level)
A handy function for doing text formatting.
Definition: indent.cxx:20
rectangleEmitter.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.