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Specular: Some vertical waves, too

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Bill Kendrick 2024-03-02 00:58:02 -08:00
parent 58e054589f
commit d74b149be8
1 changed files with 6 additions and 4 deletions
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10
magic/src/specular.c
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@ -3,7 +3,7 @@
A specular reflection Magic tool for Tux Paint A specular reflection Magic tool for Tux Paint
by Bill Kendrick <bill@newbreedsoftware.com> by Bill Kendrick <bill@newbreedsoftware.com>
Last updated: February 28, 2024 Last updated: March 2, 2024
*/ */
@ -195,17 +195,19 @@ void specular_line_callback(void *pointer, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int x, int y) SDL_Surface * snapshot, int x, int y)
{ {
magic_api *api = (magic_api *) pointer; magic_api *api = (magic_api *) pointer;
int xx, yy; int xx, yy, ysrc;
Uint8 r, g, b, r1, g1, b1, r2, g2, b2, fade; Uint8 r, g, b, r1, g1, b1, r2, g2, b2, fade;
for (yy = -specular_size / 16; yy < specular_size / 16; yy++) for (yy = -specular_size / 16; yy < specular_size / 16; yy++)
{ {
ysrc = (snapshot->h - y - yy) + sin(y - yy) * 4;
for (xx = -specular_size; xx < specular_size; xx++) for (xx = -specular_size; xx < specular_size; xx++)
{ {
if (api->in_circle(xx, yy * 16, specular_size)) if (api->in_circle(xx, yy * 16, specular_size))
{ {
SDL_GetRGB(api->getpixel(snapshot, x + xx + sin((y + yy) / 4) * 4, snapshot->h - y - yy), snapshot->format, &r1, &g1, &b1); SDL_GetRGB(api->getpixel(snapshot, x + xx + sin((y + yy) / 4) * 4, ysrc), snapshot->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(snapshot, x + xx + sin((y + yy) / 4) * 4 + 1, snapshot->h - y - yy), snapshot->format, &r2, &g2, &b2); SDL_GetRGB(api->getpixel(snapshot, x + xx + sin((y + yy) / 4) * 4 + 1, ysrc), snapshot->format, &r2, &g2, &b2);
fade = (((y + yy) * 255) / canvas->h); fade = (((y + yy) * 255) / canvas->h);
r = (((r1 + r2) * 2) + fade) / 5; r = (((r1 + r2) * 2) + fade) / 5;