1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
#include <math.h>
#include "SDL.h"
#include "SDL_opengl.h"
#include "glpong3d.h"
#include "paddle.h"
static GLuint paddle_texture;
void
GLPong_PaddleDraw(const Paddle_t * paddle) {
glLoadIdentity();
glBindTexture(GL_TEXTURE_2D, paddle_texture);
glEnable(GL_TEXTURE_2D);
glColor3f(paddle->r, paddle->g, paddle->b);
glTranslatef(paddle->coord.x + (paddle->w / 2), paddle->coord.y + (paddle->h / 2), paddle->coord.z);
glBegin(GL_QUADS);
glTexCoord2f(0.168f, 1.0f); glVertex2f(paddle->w / 2, paddle->h / 2); /* Upper Right */
glTexCoord2f(0.832f, 1.0f); glVertex2f(-paddle->w / 2, paddle->h / 2); /* Upper Left */
glTexCoord2f(0.832f, 0.0f); glVertex2f(-paddle->w / 2, -paddle->h / 2); /* Lower Left */
glTexCoord2f(0.168f, 0.0f); glVertex2f(paddle->w / 2, -paddle->h / 2); /* Lower Right */
glEnd();
glDisable(GL_TEXTURE_2D);
#ifdef DEBUG
/* Lower Left */
glLoadIdentity();
glColor3f(0.0f, 0.0f, 1.0f);
glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
/* Lower Right */
glLoadIdentity();
glColor3f(1.0f, 0.0f, 0.0f);
glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
/* Top Right */
glLoadIdentity();
glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y + paddle->h, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
/* Top Left */
glLoadIdentity();
glTranslatef(paddle->coord.x, paddle->coord.y + paddle->h, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
/* Center */
glLoadIdentity();
glColor3f(0.0f, 1.0f, 0.0f);
glTranslatef(paddle->coord.x + paddle->w / 2.0f, paddle->coord.y + paddle->h / 2.0f, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
#endif
}
void
GLPong_PaddleInit(Paddle_t * paddle, GLfloat z, GLuint texture) {
paddle->w = 0.66f;
paddle->h = 0.5f;
paddle->coord.x = paddle->w / 2.0f;
paddle->coord.y = paddle->h / 2.0f;
paddle->coord.z = z;
paddle->r = 1.0f;
paddle->g = 1.0f;
paddle->b = 1.0f;
paddle_texture = texture;
}
void
GLPong_PaddleMove(Paddle_t * paddle, GLfloat x, GLfloat y) {
GLfloat old_x = paddle->coord.x;
GLfloat old_y = paddle->coord.y;
GLfloat mouse_x;
GLfloat mouse_y;
/* clamp paddle to border */
if (x <= -1.5f + (paddle->w / 2.0f)) {
x = -1.5f + (paddle->w / 2.0f);
} else if (x >= 1.5f - (paddle->w / 2.0f)) {
x = 1.5f - (paddle->w / 2.0f);
}
if (y <= -1.0f + (paddle->h / 2.0f)) {
y = -1.0f + (paddle->h / 2.0f);
} else if (y >= 1.0f - (paddle->h / 2.0f)) {
y = 1.0f - (paddle->h / 2.0f);
}
mouse_x = x - (paddle->w / 2.0f);
mouse_y = -(y + (paddle->h / 2.0f));
printf("(mouse_x, mouse_y) = (%.3f, %.3f)\n", mouse_x, mouse_y);
printf("x diff is %f\n", fabs(mouse_x - old_x));
if (fabs(mouse_x - old_x) > 0.33f / 2.0f) {
if (mouse_x > old_x) {
paddle->coord.x += 0.33f / 2.0f;
} else {
paddle->coord.x -= 0.33f / 2.0f;
}
} else {
paddle->coord.x = mouse_x;
}
printf("y diff is %f\n", fabs(mouse_y - old_y));
if (fabs(mouse_y - old_y) > 0.25f / 2.0f) {
if (mouse_y > old_y) {
paddle->coord.y += 0.25f / 2.0f;
} else {
paddle->coord.y -= 0.25f / 2.0f;
}
} else {
paddle->coord.y = mouse_y;
}
}
|
