mirror of
https://github.com/bulletphysics/bullet3
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139 lines
3.4 KiB
C++
139 lines
3.4 KiB
C++
#ifndef RENDER_INSTANCING_DEMO_H
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#define RENDER_INSTANCING_DEMO_H
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#include "../CommonInterfaces/CommonGraphicsAppInterface.h"
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#include "Bullet3Common/b3Quaternion.h"
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#include "Bullet3Common/b3AlignedObjectArray.h"
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#include "../CommonInterfaces/CommonRenderInterface.h"
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#include "../CommonInterfaces/ExampleInterface.h"
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#include "GUIHelperInterface.h"
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///quick demo showing the right-handed coordinate system and positive rotations around each axis
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class RenderInstancingDemo : public ExampleInterface
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{
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CommonGraphicsApp* m_app;
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float m_x;
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float m_y;
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float m_z;
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b3AlignedObjectArray<int> m_movingInstances;
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enum
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{
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numCubesX = 20,
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numCubesY = 20
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};
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public:
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RenderInstancingDemo(CommonGraphicsApp* app)
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:m_app(app),
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m_x(0),
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m_y(0),
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m_z(0)
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{
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m_app->setUpAxis(2);
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{
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b3Vector3 extents=b3MakeVector3(100,100,100);
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extents[m_app->getUpAxis()]=1;
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int xres = 20;
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int yres = 20;
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b3Vector4 color0=b3MakeVector4(0.1, 0.1, 0.1,1);
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b3Vector4 color1=b3MakeVector4(0.6, 0.6, 0.6,1);
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m_app->registerGrid(xres, yres, color0, color1);
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}
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{
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int boxId = m_app->registerCubeShape(0.1,0.1,0.1);
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for (int i=-numCubesX/2;i<numCubesX/2;i++)
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{
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for (int j = -numCubesY/2;j<numCubesY/2;j++)
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{
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b3Vector3 pos=b3MakeVector3(i,j,j);
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pos[app->getUpAxis()] = 1;
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b3Quaternion orn(0,0,0,1);
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b3Vector4 color=b3MakeVector4(0.3,0.3,0.3,1);
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b3Vector3 scaling=b3MakeVector3(1,1,1);
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int instanceId = m_app->m_renderer->registerGraphicsInstance(boxId,pos,orn,color,scaling);
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m_movingInstances.push_back(instanceId);
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}
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}
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}
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m_app->m_renderer->writeTransforms();
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}
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virtual ~RenderInstancingDemo()
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{
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m_app->m_renderer->enableBlend(false);
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}
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virtual void physicsDebugDraw(int debugDrawMode)
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{
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}
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virtual void initPhysics()
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{
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}
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virtual void exitPhysics()
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{
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}
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virtual void stepSimulation(float deltaTime)
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{
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m_x+=0.01f;
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m_y+=0.01f;
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m_z+=0.01f;
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int index=0;
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for (int i=-numCubesX/2;i<numCubesX/2;i++)
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{
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for (int j = -numCubesY/2;j<numCubesY/2;j++)
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{
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b3Vector3 pos=b3MakeVector3(i,j,j);
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pos[m_app->getUpAxis()] = 1+1*b3Sin(m_x+i-j);
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float orn[4]={0,0,0,1};
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m_app->m_renderer->writeSingleInstanceTransformToCPU(pos,orn,m_movingInstances[index++]);
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}
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}
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m_app->m_renderer->writeTransforms();
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}
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virtual void renderScene()
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{
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m_app->m_renderer->renderScene();
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}
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virtual void physicsDebugDraw()
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{
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}
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virtual bool mouseMoveCallback(float x,float y)
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{
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return false;
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}
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virtual bool mouseButtonCallback(int button, int state, float x, float y)
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{
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return false;
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}
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virtual bool keyboardCallback(int key, int state)
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{
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return false;
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}
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};
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struct ExampleInterface* RenderInstancingCreateFunc(struct PhysicsInterface* pint, struct GUIHelperInterface* helper, int option)
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{
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return new RenderInstancingDemo(helper->getAppInterface());
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}
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#endif //RENDER_INSTANCING_DEMO_H
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