1 // Copyright 2020 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4
5 REG_FIDDLE_ANIMATED(Octopus_Generator_Animated, 256, 256, false, 0, 4) {
6 #include <random>
7
paintOctopus(float x,float y,int size_base,SkColor color,SkCanvas * canvas)8 void paintOctopus(float x, float y, int size_base, SkColor color, SkCanvas* canvas) {
9 SkPaint paint;
10 paint.setAntiAlias(true);
11 paint.setColor(color);
12 int radius = 3*size_base;
13 canvas->drawCircle(x, y, radius, paint);
14 for (int leg = 0; leg < 8; ++leg) {
15 canvas->drawCircle(x - radius + (2*radius/7.5*leg),
16 y + radius - pow(abs(4-leg), 2), size_base/2 + 2, paint);
17 }
18 paint.setColor(SkColorSetRGB(std::min(255u, SkColorGetR(color) + 20),
19 std::min(255u, SkColorGetG(color) + 20),
20 std::min(255u, SkColorGetB(color) + 20)));
21 canvas->drawCircle(x-size_base, y+size_base, size_base/2, paint);
22 canvas->drawCircle(x+size_base, y+size_base, size_base/2, paint);
23 }
24
draw(SkCanvas * canvas)25 void draw(SkCanvas* canvas) {
26 std::default_random_engine rng;
27 const auto randScalar = [&rng](float min, float max) -> float {
28 return std::uniform_real_distribution<float>(min, max)(rng);
29 };
30 const auto randInt = [&rng](int min, int max) -> int {
31 return std::uniform_int_distribution<int>(min, max)(rng);
32 };
33 const auto randOpaqueColor = [&rng]() -> SkColor {
34 return std::uniform_int_distribution<uint32_t>(0, 0xFFFFFF)(rng) | 0xFF000000;
35 };
36
37 for (int i = 0; i < 400; ++i) {
38 float x = randScalar(0, 256);
39 float y = randScalar(0, 256);
40 int s = randInt(6, 12);
41 SkColor c = randOpaqueColor();
42 float radius = randScalar(0, 40);
43 float angle = (randScalar(0, 1) + frame) * 6.28319;
44 x += radius * cos(angle);
45 y += radius * sin(angle);
46 paintOctopus(x, y, s, c, canvas);
47 }
48 }
49 } // END FIDDLE
50