X-Git-Url: http://git.localhorst.tv/?p=space.git;a=blobdiff_plain;f=src%2Fgraphics%2Fprimitive.cpp;fp=src%2Fgraphics%2Fprimitive.cpp;h=1a68d45a9a8a16acfcd5843af60fce1242f35119;hp=c97345a63ac0380f79f0879b8fbeda23a2bc4ffb;hb=2d0a41dc0a53915153ceccda914d59affd388864;hpb=3f4f8a92f64df08119a40da4d196b3e92ecdc637

diff --git a/src/graphics/primitive.cpp b/src/graphics/primitive.cpp
index c97345a..1a68d45 100644
--- a/src/graphics/primitive.cpp
+++ b/src/graphics/primitive.cpp
@@ -128,4 +128,40 @@ void Grid(
 	}
 }
 
+void Grid(
+		SDL_Surface *dst,
+		Vector<int> first,
+		Vector<int> second,
+		Vector<float> size,
+		Color color) {
+	Uint32 c = color.MapRGBA(dst);
+
+	Vector<int> from = min(first, second);
+	Vector<int> to = max(first, second);
+
+	if (size.x <= 1 || size.y <= 1) {
+		FillRect(dst, from, to - from, c);
+		return;
+	}
+
+	if (from.x > dst->w || from.y > dst->h || to.x < 0 || to.y < 0) {
+		return;
+	}
+
+	while (from.x < -size.x) from.x += size.x;
+	while (from.y < -size.y) from.y += size.y;
+	while (to.x > dst->w + size.x) to.x -= size.x;
+	while (to.y > dst->h + size.y) to.y -= size.y;
+
+	float width = to.x - from.x;
+	float height = to.y - from.y;
+
+	for (Vector<float> pos(from); pos.x <= to.x; pos.x += size.x) {
+		VLine(dst, pos, height, c);
+	}
+	for (Vector<float> pos(from); pos.y <= to.y; pos.y += size.y) {
+		HLine(dst, pos, width, c);
+	}
+}
+
 }