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make use of nontrapping-fptoint, add tunnel.cwa as reference

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Dennis Ranke
2022-01-02 16:34:11 +01:00
parent acea5cb6e0
commit 10ba7ed3bb
6 changed files with 24 additions and 14 deletions
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2
examples/c/cart.c
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@@ -16,7 +16,7 @@ void upd() {
float t = time() * 63.0f;
float x = (float)(i % 320 - 160);
float y = (float)(i / 320 - 120);
float d = 40000.0f / sqrt(x * x + y * y + 1.0f);
float d = 40000.0f / sqrt(x * x + y * y);
float u = atan2(x, y) * 512.0f / 3.141f;
unsigned char c = (unsigned char)((int)(d + t * 2.0f) ^ (int)(u + t)) >> 4;
FRAMEBUFFER[i] = c;