tkmap.c revision 32001f49 
1
2enum {
3    COLOR_BLACK = 0,
4    COLOR_RED,
5    COLOR_GREEN,
6    COLOR_YELLOW,
7    COLOR_BLUE,
8    COLOR_MAGENTA,
9    COLOR_CYAN,
10    COLOR_WHITE
11};
12
13static float RGBMap[9][3] = {
14    {0, 0, 0},
15    {1, 0, 0},
16    {0, 1, 0},
17    {1, 1, 0},
18    {0, 0, 1},
19    {1, 0, 1},
20    {0, 1, 1},
21    {1, 1, 1},
22    {0.5, 0.5, 0.5}
23};
24
25static void SetColor(int c)
26{
27    if (glutGet(GLUT_WINDOW_RGBA))
28        glColor3fv(RGBMap[c]);
29    else
30        glIndexf(c);
31}
32
33static void InitMap(void)
34{
35    int i;
36
37    if (rgb)
38	return;
39
40    for (i = 0; i < 9; i++)
41	    glutSetColor(i, RGBMap[i][0], RGBMap[i][1], RGBMap[i][2]);
42}
43
44static void SetFogRamp(int density, int startIndex)
45{
46    int fogValues, colorValues;
47    int i, j, k;
48    float intensity;
49
50    fogValues = 1 << density;
51    colorValues = 1 << startIndex;
52    for (i = 0; i < colorValues; i++) {
53	for (j = 0; j < fogValues; j++) {
54	    k = i * fogValues + j;
55	    intensity = (i * fogValues + j * colorValues) / 255.0;
56	    glutSetColor(k, intensity, intensity, intensity);
57	}
58    }
59}
60
61static void SetGreyRamp(void)
62{
63    int i;
64    float intensity;
65
66    for (i = 0; i < 255; i++) {
67	intensity = i / 255.0;
68	glutSetColor(i, intensity, intensity, intensity);
69    }
70}
71
72