work in progress
nearly coincident mostly work
support files for creating projects from gyp
git-svn-id: http://skia.googlecode.com/svn/trunk@3500 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/ShapeOpsDemo.cpp b/experimental/Intersection/ShapeOpsDemo.cpp
new file mode 100644
index 0000000..a2690ea
--- /dev/null
+++ b/experimental/Intersection/ShapeOpsDemo.cpp
@@ -0,0 +1,110 @@
+#include "EdgeWalker_Test.h"
+#include "ShapeOps.h"
+#include "SkApplication.h"
+#include "SkCanvas.h"
+#include "SkEvent.h"
+#include "SkGraphics.h"
+#include "SkPaint.h"
+
+SkCanvas* canvas = 0;
+SkBitmap* bitmap;
+
+static bool test15(SkCanvas* canvas) {
+ // Three circles bounce inside a rectangle. The circles describe three, four
+ // or five points which in turn describe a polygon. The polygon points
+ // bounce inside the circles. The circles rotate and scale over time. The
+ // polygons are combined into a single path, simplified, and stroked.
+ static int step = 0;
+ const int circles = 3;
+ int scales[circles];
+ int angles[circles];
+ int locs[circles * 2];
+ int pts[circles * 2 * 4];
+ int c, p;
+ for (c = 0; c < circles; ++c) {
+ scales[c] = abs(10 - (step + c * 4) % 21);
+ angles[c] = (step + c * 6) % 600;
+ locs[c * 2] = abs(130 - (step + c * 9) % 261);
+ locs[c * 2 + 1] = abs(170 - (step + c * 11) % 341);
+ for (p = 0; p < 4; ++p) {
+ pts[c * 8 + p * 2] = abs(90 - ((step + c * 121 + p * 13) % 190));
+ pts[c * 8 + p * 2 + 1] = abs(110 - ((step + c * 223 + p * 17) % 230));
+ }
+ }
+ SkPath path, out;
+ for (c = 0; c < circles; ++c) {
+ for (p = 0; p < 4; ++p) {
+ SkScalar x = pts[c * 8 + p * 2];
+ SkScalar y = pts[c * 8 + p * 2 + 1];
+ x *= 3 + scales[c] / 10.0f;
+ y *= 3 + scales[c] / 10.0f;
+ SkScalar angle = angles[c] * 3.1415f * 2 / 600;
+ SkScalar temp = x * cos(angle) - y * sin(angle);
+ y = x * sin(angle) + y * cos(angle);
+ x = temp;
+ x += locs[c * 2] * 200 / 130.0f;
+ y += locs[c * 2 + 1] * 200 / 170.0f;
+ x += 50;
+ // y += 200;
+ if (p == 0) {
+ path.moveTo(x, y);
+ } else {
+ path.lineTo(x, y);
+ }
+ }
+ path.close();
+ }
+ showPath(path, "original:");
+ simplify(path, true, out);
+ showPath(out, "simplified:");
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setStrokeWidth(3);
+ paint.setColor(0x3F007fbF);
+ canvas->drawPath(path, paint);
+ paint.setColor(0xFF60FF00);
+ paint.setStrokeWidth(1);
+ canvas->drawPath(out, paint);
+ ++step;
+ return true;
+}
+
+static bool (*tests[])(SkCanvas* ) = {
+ test15,
+};
+
+static size_t testsCount = sizeof(tests) / sizeof(tests[0]);
+
+static bool (*firstTest)(SkCanvas*) = test15;
+
+extern "C" void* getPixels(bool* animate);
+extern "C" void unlockPixels();
+
+extern "C" void* getPixels(bool* animate) {
+ if (!canvas) {
+ canvas = new SkCanvas();
+ bitmap = new SkBitmap();
+ SkBitmap::Config config = SkBitmap::kARGB_8888_Config;
+
+ bitmap->setConfig(config, 1100, 630);
+ bitmap->allocPixels();
+ bitmap->setIsOpaque(true);
+ canvas->setBitmapDevice(*bitmap);
+ }
+ canvas->drawColor(SK_ColorWHITE);
+ size_t index = 0;
+ if (index == 0 && firstTest) {
+ while (index < testsCount && tests[index] != firstTest) {
+ ++index;
+ }
+ }
+ *animate = (tests[index])(canvas);
+ bitmap->lockPixels();
+ return bitmap->getPixels();
+}
+
+extern "C" void unlockPixels() {
+ bitmap->unlockPixels();
+}
+