save work in progress
git-svn-id: http://skia.googlecode.com/svn/trunk@3141 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/RectUtilities.cpp b/experimental/Intersection/RectUtilities.cpp
new file mode 100644
index 0000000..e7bda02
--- /dev/null
+++ b/experimental/Intersection/RectUtilities.cpp
@@ -0,0 +1,44 @@
+#include "DataTypes.h"
+#include "Extrema.h"
+
+void _Rect::setBounds(const Cubic& cubic) {
+ set(cubic[0]);
+ add(cubic[3]);
+ double tValues[4];
+ int roots = SkFindCubicExtrema(cubic[0].x, cubic[1].x, cubic[2].x,
+ cubic[3].x, tValues);
+ roots += SkFindCubicExtrema(cubic[0].y, cubic[1].y, cubic[2].y, cubic[3].y,
+ &tValues[roots]);
+ for (int x = 0; x < roots; ++x) {
+ _Point result;
+ xy_at_t(cubic, tValues[x], result.x, result.y);
+ add(result);
+ }
+}
+
+void _Rect::setRawBounds(const Cubic& cubic) {
+ set(cubic[0]);
+ for (int x = 1; x < 4; ++x) {
+ add(cubic[x]);
+ }
+}
+
+void _Rect::setBounds(const Quadratic& quad) {
+ set(quad[0]);
+ add(quad[2]);
+ double tValues[2];
+ int roots = SkFindQuadExtrema(quad[0].x, quad[1].x, quad[2].x, tValues);
+ roots += SkFindQuadExtrema(quad[0].y, quad[1].y, quad[2].y, &tValues[roots]);
+ for (int x = 0; x < roots; ++x) {
+ _Point result;
+ xy_at_t(quad, tValues[x], result.x, result.y);
+ add(result);
+ }
+}
+
+void _Rect::setRawBounds(const Quadratic& quad) {
+ set(quad[0]);
+ for (int x = 1; x < 3; ++x) {
+ add(quad[x]);
+ }
+}