sprites 256c, shadow oam, sprite transforms, sinlut

[gbajam21] / tools / lutgen.c

diff --git a/tools/lutgen.c b/tools/lutgen.c
new file mode 100644 (file)
index 0000000..c3f003a
--- /dev/null
+++ b/tools/lutgen.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <math.h>
+
+int main(void)
+{
+       int i;
+
+       puts("\t.data");
+       puts("\t.globl sinlut");
+       puts("sinlut:");
+       for(i=0; i<256; i++) {
+               float x = sin((float)i / 128.0f * M_PI);
+               printf("\t.byte %d\n", (int)(x * 127.5f - 0.5f));
+       }
+       return 0;
+}