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Slight speed improvements for lensing

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This commit is contained in:
Simon Robertshaw 2011-07-24 14:26:32 +01:00
parent 7808059453
commit fbb72e4f32
1 changed files with 21 additions and 5 deletions
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26
src/graphics.c
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@ -3749,18 +3749,34 @@ void render_signs(pixel *vid_buf)
void render_gravlensing(pixel *src, pixel * dst)
{
int nx, ny, rx, ry, gx, gy, bx, by;
int r, g, b;
pixel t;
for(nx = 0; nx < XRES; nx++)
{
for(ny = 0; ny < YRES; ny++)
{
rx = nx-(gravxf[(ny*XRES)+nx]*0.5f);
ry = ny-(gravyf[(ny*XRES)+nx]*0.5f);
gx = nx-(gravxf[(ny*XRES)+nx]*0.75f);
gy = ny-(gravyf[(ny*XRES)+nx]*0.75f);
rx = nx-(gravxf[(ny*XRES)+nx]*0.75f);
ry = ny-(gravyf[(ny*XRES)+nx]*0.75f);
gx = nx-(gravxf[(ny*XRES)+nx]*0.875f);
gy = ny-(gravyf[(ny*XRES)+nx]*0.875f);
bx = nx-(gravxf[(ny*XRES)+nx]);
by = ny-(gravyf[(ny*XRES)+nx]);
if(rx > 0 && rx < XRES && ry > 0 && ry < YRES && gx > 0 && gx < XRES && gy > 0 && gy < YRES && bx > 0 && bx < XRES && by > 0 && by < YRES)
addpixel(dst, nx, ny, PIXR(src[ry*(XRES+BARSIZE)+rx]), PIXG(src[gy*(XRES+BARSIZE)+gx]), PIXB(src[by*(XRES+BARSIZE)+bx]), 255);
{
t = dst[ny*(XRES+BARSIZE)+nx];
r = PIXR(src[ry*(XRES+BARSIZE)+rx]) + PIXR(t);
g = PIXG(src[gy*(XRES+BARSIZE)+gx]) + PIXG(t);
b = PIXB(src[by*(XRES+BARSIZE)+bx]) + PIXB(t);
if (r>255)
r = 255;
if (g>255)
g = 255;
if (b>255)
b = 255;
dst[ny*(XRES+BARSIZE)+nx] = PIXRGB(r,g,b);
// addpixel(dst, nx, ny, PIXR(src[ry*(XRES+BARSIZE)+rx]), PIXG(src[gy*(XRES+BARSIZE)+gx]), PIXB(src[by*(XRES+BARSIZE)+bx]), 255);
}
/*rx = nx+(gravxf[(ny*XRES)+nx]*0.5f);
ry = ny+(gravyf[(ny*XRES)+nx]*0.5f);
gx = nx+(gravxf[(ny*XRES)+nx]*0.75f);