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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403459
This commit is contained in:
Sam Lantinga 2009-01-04 23:41:09 +00:00
parent dade1f12e6
commit ba8f64f259
3 changed files with 84 additions and 59 deletions
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95
test/testintersections.c
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@ -67,9 +67,13 @@ DrawPoints(SDL_WindowID window)
#define MAX_LINES 16
int num_lines = 0;
SDL_Rect lines[MAX_LINES];
static int add_line(int x1, int y1, int x2, int y2) {
if (num_lines >= MAX_LINES) return 0;
if ((x1 == x2) && (y1 == y2)) return 0;
static int
add_line(int x1, int y1, int x2, int y2)
{
if (num_lines >= MAX_LINES)
return 0;
if ((x1 == x2) && (y1 == y2))
return 0;
printf("adding line (%d, %d), (%d, %d)\n", x1, y1, x2, y2);
lines[num_lines].x = x1;
@ -110,14 +114,21 @@ DrawLines(SDL_WindowID window)
#define MAX_RECTS 16
int num_rects = 0;
SDL_Rect rects[MAX_RECTS];
static int add_rect(int x1, int y1, int x2, int y2) {
if (num_rects >= MAX_RECTS) return 0;
if ((x1 == x2) || (y1 == y2)) return 0;
static int
add_rect(int x1, int y1, int x2, int y2)
{
if (num_rects >= MAX_RECTS)
return 0;
if ((x1 == x2) || (y1 == y2))
return 0;
if (x1 > x2) SWAP(int, x1, x2);
if (y1 > y2) SWAP(int, y1, y2);
if (x1 > x2)
SWAP(int, x1, x2);
if (y1 > y2)
SWAP(int, y1, y2);
printf("adding rect (%d, %d), (%d, %d) [%dx%d]\n", x1, y1, x2, y2, x2-x1, y2-y1);
printf("adding rect (%d, %d), (%d, %d) [%dx%d]\n", x1, y1, x2, y2,
x2 - x1, y2 - y1);
rects[num_rects].x = x1;
rects[num_rects].y = y1;
@ -155,21 +166,21 @@ DrawRectLineIntersections(SDL_WindowID window)
SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
for (i = 0; i < num_rects; i++)
for (j = 0; j < num_lines; j++) {
int x1, y1, x2, y2;
SDL_Rect r;
r = rects[i];
x1 = lines[j].x;
y1 = lines[j].y;
x2 = lines[j].w;
y2 = lines[j].h;
for (j = 0; j < num_lines; j++) {
int x1, y1, x2, y2;
SDL_Rect r;
if (SDL_IntersectRectAndLine(&r, &x1, &y1, &x2, &y2)) {
SDL_SetRenderDrawColor(0, 255, 55, 255);
SDL_RenderLine(x1, y1, x2, y2);
r = rects[i];
x1 = lines[j].x;
y1 = lines[j].y;
x2 = lines[j].w;
y2 = lines[j].h;
if (SDL_IntersectRectAndLine(&r, &x1, &y1, &x2, &y2)) {
SDL_SetRenderDrawColor(0, 255, 55, 255);
SDL_RenderLine(x1, y1, x2, y2);
}
}
}
SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
}
@ -182,13 +193,13 @@ DrawRectRectIntersections(SDL_WindowID window)
SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
for (i = 0; i < num_rects; i++)
for (j = i+1; j < num_rects; j++) {
SDL_Rect r;
if (SDL_IntersectRect(&rects[i], &rects[j], &r)) {
SDL_SetRenderDrawColor(255, 200, 0, 255);
SDL_RenderFill(&r);
for (j = i + 1; j < num_rects; j++) {
SDL_Rect r;
if (SDL_IntersectRect(&rects[i], &rects[j], &r)) {
SDL_SetRenderDrawColor(255, 200, 0, 255);
SDL_RenderFill(&r);
}
}
}
SDL_SetRenderDrawBlendMode(SDL_BLENDMODE_NONE);
}
@ -285,21 +296,29 @@ main(int argc, char *argv[])
case SDL_MOUSEBUTTONUP:
if (event.button.which == 0) {
if (event.button.button == 3)
add_line(mouse_begin_x, mouse_begin_y, event.button.x, event.button.y);
add_line(mouse_begin_x, mouse_begin_y, event.button.x,
event.button.y);
if (event.button.button == 1)
add_rect(mouse_begin_x, mouse_begin_y, event.button.x, event.button.y);
add_rect(mouse_begin_x, mouse_begin_y, event.button.x,
event.button.y);
}
break;
case SDL_KEYDOWN:
switch (event.key.keysym.sym) {
case 'l':
if (event.key.keysym.mod & KMOD_SHIFT) num_lines = 0;
else add_line(rand()%640, rand()%480, rand()%640, rand()%480);
break;
case 'r':
if (event.key.keysym.mod & KMOD_SHIFT) num_rects = 0;
else add_rect(rand()%640, rand()%480, rand()%640, rand()%480);
break;
case 'l':
if (event.key.keysym.mod & KMOD_SHIFT)
num_lines = 0;
else
add_line(rand() % 640, rand() % 480, rand() % 640,
rand() % 480);
break;
case 'r':
if (event.key.keysym.mod & KMOD_SHIFT)
num_rects = 0;
else
add_rect(rand() % 640, rand() % 480, rand() % 640,
rand() % 480);
break;
}
break;
case SDL_WINDOWEVENT: