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-rw-r--r--progs/samples/tkmap.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/progs/samples/tkmap.c b/progs/samples/tkmap.c
new file mode 100644
index 0000000000..3ded79caca
--- /dev/null
+++ b/progs/samples/tkmap.c
@@ -0,0 +1,71 @@
+
+enum {
+ COLOR_BLACK = 0,
+ COLOR_RED,
+ COLOR_GREEN,
+ COLOR_YELLOW,
+ COLOR_BLUE,
+ COLOR_MAGENTA,
+ COLOR_CYAN,
+ COLOR_WHITE
+};
+
+static float RGBMap[9][3] = {
+ {0, 0, 0},
+ {1, 0, 0},
+ {0, 1, 0},
+ {1, 1, 0},
+ {0, 0, 1},
+ {1, 0, 1},
+ {0, 1, 1},
+ {1, 1, 1},
+ {0.5, 0.5, 0.5}
+};
+
+static void SetColor(int c)
+{
+ if (glutGet(GLUT_WINDOW_RGBA))
+ glColor3fv(RGBMap[c]);
+ else
+ glIndexf(c);
+}
+
+static void InitMap(void)
+{
+ int i;
+
+ if (rgb)
+ return;
+
+ for (i = 0; i < 9; i++)
+ glutSetColor(i, RGBMap[i][0], RGBMap[i][1], RGBMap[i][2]);
+}
+
+static void SetFogRamp(int density, int startIndex)
+{
+ int fogValues, colorValues;
+ int i, j, k;
+ float intensity;
+
+ fogValues = 1 << density;
+ colorValues = 1 << startIndex;
+ for (i = 0; i < colorValues; i++) {
+ for (j = 0; j < fogValues; j++) {
+ k = i * fogValues + j;
+ intensity = (i * fogValues + j * colorValues) / 255.0;
+ glutSetColor(k, intensity, intensity, intensity);
+ }
+ }
+}
+
+static void SetGreyRamp(void)
+{
+ int i;
+ float intensity;
+
+ for (i = 0; i < 255; i++) {
+ intensity = i / 255.0;
+ glutSetColor(i, intensity, intensity, intensity);
+ }
+}
+