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ad9f1fb6 | 1 | #include "graphics.h" |
617dcc71 | 2 | #include "../debug.h" |
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3 | |
4 | #include <GL/gl.h> | |
5 | #include <GL/glu.h> | |
6 | #include <SDL/SDL.h> | |
7 | #include <cmath> | |
8 | ||
617dcc71 | 9 | #include "../mathw.h" |
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10 | |
11 | /// ***** Private Method Headers ***** | |
617dcc71 | 12 | |
f7b3b2eb | 13 | void drawCircle(int); |
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14 | void sdlInit(); |
15 | void glInit(); | |
16 | ||
617dcc71 | 17 | /// ***** Initializers/Cleaners ***** |
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18 | |
19 | void graphicsInit() | |
20 | { | |
21 | sdlInit(); | |
22 | glInit(); | |
23 | } | |
24 | ||
617dcc71 | 25 | void graphicsClean() |
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26 | { |
27 | ||
28 | } | |
29 | ||
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30 | /// ***** Public Methods ***** |
31 | ||
89ca62b2 | 32 | void glDrawCircle(float radius, const Vector2& vec, const float* color) |
ad9f1fb6 | 33 | { |
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34 | glMatrixMode(GL_MODELVIEW); |
35 | glLoadIdentity(); | |
89ca62b2 | 36 | glTranslatef(vec.x, vec.y, -1); |
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37 | glScalef(radius, radius, radius); |
38 | ||
39 | if(color != NULL) | |
40 | glColor3fv(color); | |
41 | ||
42 | drawCircle(32); | |
43 | } | |
44 | ||
45 | /// ***** Private Methods ***** | |
ad9f1fb6 | 46 | |
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47 | void drawCircle(int pieces) |
48 | { | |
ad9f1fb6 | 49 | glBegin(GL_POLYGON); |
f7b3b2eb | 50 | for(int n = 0; n < pieces; n++) |
ad9f1fb6 | 51 | { |
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52 | float angle = 2 * PI * n / pieces; |
53 | float ix = cos(angle); | |
54 | float iy = sin(angle); | |
ad9f1fb6 | 55 | |
f7b3b2eb | 56 | glVertex3f(ix, iy, 0); |
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57 | } |
58 | glEnd(); | |
59 | } | |
60 | ||
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61 | void sdlInit() |
62 | { | |
63 | if(SDL_Init(SDL_INIT_VIDEO) < 0) | |
64 | { | |
65 | cerr << "SDL_Init failed: " << SDL_GetError() << endl; | |
66 | exit(1); | |
67 | } | |
68 | ||
69 | // In order to use SDL_OPENGLBLIT we have to | |
70 | // set GL attributes first | |
71 | SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 8); | |
72 | SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); | |
73 | ||
74 | if(SDL_SetVideoMode(800, 600, 16, SDL_OPENGL) < 0) | |
75 | { | |
76 | cerr << "SDL_SetVideoMode failed: " << SDL_GetError() << endl; | |
77 | exit(1); | |
78 | } | |
79 | } | |
80 | ||
81 | void glInit() | |
82 | { | |
83 | glClearColor(0.0, 0.0, 0.0, 0.0); | |
84 | ||
85 | glMatrixMode(GL_PROJECTION); | |
86 | glLoadIdentity(); | |
87 | ||
f7b3b2eb | 88 | glOrtho(0, 800.0, 600.0, 0.0, -0.01, 1.01); |
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89 | |
90 | glMatrixMode(GL_MODELVIEW); | |
91 | glLoadIdentity(); | |
92 | ||
93 | glEnable(GL_DEPTH_TEST); | |
94 | } |