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Slayne's pixel-perfect collision detection patch

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git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@304 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
gewlitys
2002-12-03 20:59:35 +00:00
parent 64e01a753b
commit 5f118170ab
3 changed files with 38 additions and 12 deletions
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sc2/src/sc2code/libs/graphics/sdl/3do_funcs.c
+37 -4
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@@ -21,6 +21,7 @@
#include "sdl_common.h"
#include "pure.h"
#include "opengl.h"
#include "primitives.h"
int batch_depth = 0;
static const BOOLEAN pausing_transition = TRUE; // change to FALSE for non-pausing version
@@ -297,15 +298,47 @@ _init_video_file(PVOID pStr)
return (ret);
}
// Status: Unimplemented
// Status: Implemented
BOOLEAN
_image_intersect (PIMAGE_BOX box1, PIMAGE_BOX box2, PRECT rect)
// This is a biggie.
{
BOOLEAN ret;
SDL_Surface *img1, *img2;
int img1w, img1xpos, img1ypos, img2w, img2xpos, img2ypos;
int x,y;
Uint32 img1colourkey, img2colourkey;
GetPixelFn getpixel1, getpixel2;
/* Image is (TFB_IMAGE*)(box1->FramePtr + box1->FramePtr->DataOffs) */
img1 = ((TFB_Image*)((BYTE*)(box1->FramePtr) + box1->FramePtr->DataOffs))->NormalImg;
img2 = ((TFB_Image*)((BYTE*)(box2->FramePtr) + box2->FramePtr->DataOffs))->NormalImg;
getpixel1 = getpixel_for(img1);
getpixel2 = getpixel_for(img2);
img1w = img1->w;
img1xpos = box1->Box.corner.x;
img1ypos = box1->Box.corner.y;
img1colourkey = img1->format->colorkey;
img2w = img2->w;
img2xpos = box2->Box.corner.x;
img2ypos = box2->Box.corner.y;
img2colourkey = img2->format->colorkey;
for (y = rect->corner.y; y < rect->corner.y + rect->extent.height; ++y)
{
for (x = rect->corner.x; x < rect->corner.x + rect->extent.width; ++x)
{
if ((getpixel1(img1, x - img1xpos, y - img1ypos) != img1colourkey) &&
(getpixel2(img2, x - img2xpos, y - img2ypos) != img2colourkey))
{
return TRUE;
}
}
}
ret = FALSE;
// fprintf (stderr, "Unimplemented function activated: _image_intersect()\n");
ret = TRUE;
return (ret);
}