| #if 0 // Disabled until updated to use current API. |
| // Copyright 2019 Google LLC. |
| // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. |
| #include "tools/fiddle/examples.h" |
| // HASH=8b8a4cd8a29d22bb9c5e63b70357bd65 |
| REG_FIDDLE(Point_CrossProduct, 256, 256, false, 0) { |
| void draw(SkCanvas* canvas) { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| SkVector vectors[][2] = {{{50, 2}, {-14, 20}}, {{0, 50}, {-50, 0}}, {{-20, 25}, {25, -20}}, |
| {{-20, -24}, {-24, -20}}}; |
| SkPoint center[] = {{32, 32}, {160, 32}, {32, 160}, {160, 160}}; |
| paint.setStrokeWidth(2); |
| for (size_t i = 0; i < 4; ++i) { |
| paint.setColor(SK_ColorRED); |
| canvas->drawLine(center[i], center[i] + vectors[i][0], paint); |
| paint.setColor(SK_ColorBLUE); |
| canvas->drawLine(center[i], center[i] + vectors[i][1], paint); |
| SkString str; |
| SkScalar cross = SkPoint::CrossProduct(vectors[i][1], vectors[i][0]); |
| str.printf("cross = %g", cross); |
| paint.setColor(cross >= 0 ? SK_ColorRED : SK_ColorBLUE); |
| canvas->drawString(str, center[i].fX, center[i].fY, paint); |
| } |
| } |
| } // END FIDDLE |
| #endif // Disabled until updated to use current API. |