skia2/docs/examples/Point_CrossProduct.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

28 lines
1.2 KiB
C++

#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.