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| author | yenatch <yenatch@gmail.com> | 2013-09-03 18:40:12 -0400 |
|---|---|---|
| committer | yenatch <yenatch@gmail.com> | 2013-09-03 18:40:12 -0400 |
| commit | 23bb05851b0f71ca7cf9277d46f09e799986350d (patch) | |
| tree | 745dfd252ba6000be7d9990d59c5ba4503761aee /engine | |
| parent | 12e6ff3fc6e6dcef94e87a8d500ab0e2fc5b9e5c (diff) | |
split Sine/Cosine into engine/sine.asm
Diffstat (limited to 'engine')
| -rw-r--r-- | engine/sine.asm | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/engine/sine.asm b/engine/sine.asm new file mode 100644 index 000000000..09d06ca89 --- /dev/null +++ b/engine/sine.asm @@ -0,0 +1,22 @@ +Cosine: ; 1b0f +; Return d * cos(a) in hl + add $10 ; 90 degrees + +Sine: ; 1b11 +; Return d * sin(a) in hl +; a is a signed 6-bit value. + + ld e, a + + ld a, [hROMBank] + push af + ld a, BANK(_Sine) + rst Bankswitch + + call _Sine + + pop af + rst Bankswitch + ret +; 1b1e + |