foo

[cyberay] / src / rt.c

diff --git a/src/rt.c b/src/rt.c
new file mode 100644 (file)
index 0000000..2c6ceaf
--- /dev/null
+++ b/src/rt.c
@@ -0,0 +1,37 @@
+#include "rt.h"
+
+struct framebuffer fb;
+
+int fbsize(int width, int height)
+{
+       void *tmp;
+
+       if(!(tmp = malloc(width * height * sizeof *fb.pixels))) {
+               return -1;
+       }
+
+       free(fb.pixels);
+       fb.pixels = tmp;
+       fb.width = width;
+       fb.height = height;
+       return 0;
+}
+
+void render(void)
+{
+       int i, j;
+       cgm_vec3 *fbptr = fb.pixels;
+
+       for(i=0; i<fb.height; i++) {
+               for(j=0; j<fb.width; j++) {
+                       if(i < 3 || i >= fb.height - 3 || j < 3 || j >= fb.width - 3) {
+                               fbptr->x = 1.0f;
+                               fbptr->y = fbptr->z = 0.0f;
+                       } else {
+                               fbptr->x = fbptr->z = 0.0f;
+                               fbptr->y = 1.0f;
+                       }
+                       fbptr++;
+               }
+       }
+}