quakeforge/ruamoko/qwaq/qwaq-rect.r

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#include "qwaq-rect.h"
Rect
clipRect (Rect clipRect, Rect rect)
{
if (rect.offset.x < clipRect.offset.x) {
int dist = clipRect.offset.x - rect.offset.x;
rect.offset.x += dist;
rect.extent.width -= dist;
}
if (rect.offset.y < clipRect.offset.y) {
int dist = clipRect.offset.y - rect.offset.y;
rect.offset.y += dist;
rect.extent.height -= dist;
}
if (rect.offset.x + rect.extent.width > clipRect.extent.width) {
rect.extent.width = clipRect.extent.width - rect.offset.x;
}
if (rect.offset.y + rect.extent.height > clipRect.extent.height) {
rect.extent.height = clipRect.extent.height - rect.offset.y;
}
return rect;
}
Rect
makeRect (int xpos, int ypos, int xlen, int ylen)
{
Rect rect = {{xpos, ypos}, {xlen, ylen}};
return rect;
}
Point makePoint (int x, int y)
{
return {x, y};
}
Extent makeExtent (int width, int height)
{
return {width, height};
}
Extent mergeExtents (Extent a, Extent b)
{
return { a.width < b.width ? b.width : a.width,
a.height < b.height ? b.height : a.height };
}
int
rectContainsPoint (Rect rect, Point point)
{
return ((point.x >= rect.offset.x
&& point.x < rect.offset.x + rect.extent.width)
&& (point.y >= rect.offset.y
&& point.y < rect.offset.y + rect.extent.height));
}