tunnel rotation with lower-res scaled-up tunnel

[gbajam21] / tools / tungen.c

diff --git a/tools/tungen.c b/tools/tungen.c
index 4148b26..ec21217 100644 (file)
--- a/tools/tungen.c
+++ b/tools/tungen.c
@@ -52,8 +52,8 @@ invalopt:     fprintf(stderr, "invalid argument: %s\n", argv[i]);
        prev_r = 0.0f;
        for(i=0; i<VDIV; i++) {
                float v = (float)(VDIV - i) / (float)VDIV;
-               float r = 4.0 / v + 16;
-               float z = v * 400.0f;
+               float r = 1.5 / v + 16;
+               float z = v * 200.0f;
 
                /* don't bother drawing rings < 1 pixel apart */
                if(fabs(r - prev_r) < 0.05) continue;
@@ -87,7 +87,12 @@ invalopt:    fprintf(stderr, "invalid argument: %s\n", argv[i]);
                        float u = ptr->x;
                        float v = ptr->y;
                        int r = (int)(u * 8.0 * 255.0f) & 0xff;
-                       int b = (int)(v * 8.0 * 255.0f) & 0xff;
+                       int g = (int)(v * 8.0 * 255.0f) & 0xff;
+                       int b = (~(int)(v * 0.5 * 255.0f) & 0xff) + 105;
+                       if(b > 255) b = 255;
+                       if(b < 0) b = 0;
+
+                       /*if(v > 2.0) r = g = b = 0;*/
 
                        ptr++;
 
@@ -97,7 +102,7 @@ invalopt:    fprintf(stderr, "invalid argument: %s\n", argv[i]);
 
                        if(fp) {
                                fputc(r, fp);
-                               fputc(0, fp);
+                               fputc(g, fp);
                                fputc(b, fp);
                        }
                }