mirror of https://github.com/axmolengine/axmol.git
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
// MIT License
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// Copyright (c) 2019 Erin Catto
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "test.h"
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class ConvexHull : public Test
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{
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public:
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enum
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{
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e_count = b2_maxPolygonVertices
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};
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ConvexHull()
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{
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Generate();
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m_auto = false;
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}
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void Generate()
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{
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b2Vec2 lowerBound(-8.0f, -8.0f);
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b2Vec2 upperBound(8.0f, 8.0f);
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for (int32 i = 0; i < e_count; ++i)
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{
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float x = 10.0f * RandomFloat();
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float y = 10.0f * RandomFloat();
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// Clamp onto a square to help create collinearities.
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// This will stress the convex hull algorithm.
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b2Vec2 v(x, y);
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v = b2Clamp(v, lowerBound, upperBound);
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m_points[i] = v;
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}
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m_count = e_count;
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}
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void Keyboard(int key) override
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{
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switch (key)
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{
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case GLFW_KEY_A:
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m_auto = !m_auto;
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break;
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case GLFW_KEY_G:
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Generate();
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break;
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}
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}
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void Step(Settings& settings) override
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{
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Test::Step(settings);
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b2PolygonShape shape;
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shape.Set(m_points, m_count);
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DrawString(5, m_textLine, "Press g to generate a new random convex hull");
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g_debugDraw.DrawPolygon(shape.m_vertices, shape.m_count, b2Color(0.9f, 0.9f, 0.9f));
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for (int32 i = 0; i < m_count; ++i)
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{
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g_debugDraw.DrawPoint(m_points[i], 3.0f, b2Color(0.3f, 0.9f, 0.3f));
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DrawString(m_points[i] + b2Vec2(0.05f, 0.05f), "%d", i);
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}
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if (shape.Validate() == false)
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{
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m_textLine += 0;
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}
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if (m_auto)
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{
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Generate();
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}
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}
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static Test* Create() { return new ConvexHull; }
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b2Vec2 m_points[b2_maxPolygonVertices];
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int32 m_count;
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bool m_auto;
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};
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static int testIndex = RegisterTest("Geometry", "Convex Hull", ConvexHull::Create);
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