| 75 | } |
| 76 | |
| 77 | void draw(visage::Canvas& canvas) override { |
| 78 | double render_time = canvas.time(); |
| 79 | for (int r = 0; r < kNumLines; ++r) { |
| 80 | float position = 0.0f; |
| 81 | for (int i = 0; i < kNumPoints; ++i) { |
| 82 | float t = i / (kNumPoints - 1.0f); |
| 83 | float delta = std::min(t, 1.0f - t); |
| 84 | position += 0.1f * delta * delta + 0.003f; |
| 85 | double phase = (render_time + r) * 0.5; |
| 86 | float y = sin1(phase + position) * 0.4f + 0.5f; |
| 87 | graph_lines_[r]->set(i, y); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | redraw(); |
| 92 | } |
| 93 | |
| 94 | private: |
| 95 | std::unique_ptr<visage::GraphLine> graph_lines_[kNumLines]; |