save work in progress

git-svn-id: http://skia.googlecode.com/svn/trunk@3141 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 44 insertions, 0 deletions

diff --git a/experimental/Intersection/RectUtilities.cpp b/experimental/Intersection/RectUtilities.cpp
new file mode 100644
index 0000000000..e7bda028ee
--- /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]);
+    }
+}