move 'main' functions into a separate folder, to make it easier to create standalone demos (console app without gui, or opengl app, and possibly even other versions, like a software renderer, producing pictures in the cloud)
Add a line in an example cpp file to allow a standalone version. See examples/BasicExample.cpp: B3_STANDALONE_EXAMPLE(BasicExampleCreateFunc)
This commit is contained in:
erwin coumans
266
examples/StandaloneMain/main_sw_tinyrenderer_single_example.cpp
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266
examples/StandaloneMain/main_sw_tinyrenderer_single_example.cpp
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/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2015 Google Inc. http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../CommonInterfaces/CommonExampleInterface.h"
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#include "../CommonInterfaces/CommonGUIHelperInterface.h"
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#include "BulletCollision/CollisionDispatch/btCollisionObject.h"
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#include "BulletCollision/CollisionShapes/btCollisionShape.h"
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#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h"
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#include "LinearMath/btTransform.h"
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#include "LinearMath/btHashMap.h"
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#include "../TinyRenderer/TinyRenderer.h"
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#include "../OpenGLWindow/SimpleOpenGL3App.h"
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#include <stdio.h>
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#include "../ExampleBrowser/OpenGLGuiHelper.h"
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class SW_And_OpenGLGuiHelper : public OpenGLGuiHelper
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{
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btHashMap<btHashInt,TinyRenderObjectData*> m_swRenderObjects;
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btHashMap<btHashInt,int> m_swInstances;
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int m_swWidth;
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int m_swHeight;
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TGAImage m_rgbColorBuffer;
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b3AlignedObjectArray<float> m_depthBuffer;
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int m_textureHandle;
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unsigned char* m_image;
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GLPrimitiveRenderer* m_primRenderer;
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public:
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SW_And_OpenGLGuiHelper (CommonGraphicsApp* glApp, bool useOpenGL2, int swWidth, int swHeight, GLPrimitiveRenderer* primRenderer)
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:OpenGLGuiHelper(glApp,useOpenGL2),
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m_swWidth(swWidth),
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m_swHeight(swHeight),
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m_rgbColorBuffer(swWidth,swHeight,TGAImage::RGB),
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m_primRenderer(primRenderer)
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{
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m_depthBuffer.resize(swWidth*swHeight);
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CommonRenderInterface* render = getRenderInterface();
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m_image=new unsigned char[m_swWidth*m_swHeight*4];
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m_textureHandle = render->registerTexture(m_image,m_swWidth,m_swHeight);
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}
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void clearBuffers(TGAColor& clearColor)
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{
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for(int y=0;y<m_swHeight;++y)
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{
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for(int x=0;x<m_swWidth;++x)
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{
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m_rgbColorBuffer.set(x,y,clearColor);
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m_depthBuffer[x+y*m_swWidth] = -1e30f;
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}
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}
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}
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const TGAImage& getFrameBuffer() const
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{
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return m_rgbColorBuffer;
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}
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virtual ~SW_And_OpenGLGuiHelper()
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{
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for (int i=0;i<m_swRenderObjects.size();i++)
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{
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TinyRenderObjectData** d = m_swRenderObjects[i];
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if (d && *d)
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{
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delete *d;
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}
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}
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}
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virtual void createCollisionObjectGraphicsObject(btCollisionObject* obj,const btVector3& color)
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{
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OpenGLGuiHelper::createCollisionObjectGraphicsObject(obj,color);
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int colIndex = obj->getUserIndex();
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int shapeIndex = obj->getCollisionShape()->getUserIndex();
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if (colIndex>=0 && shapeIndex>=0)
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{
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m_swInstances.insert(colIndex,shapeIndex);
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}
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}
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virtual int registerGraphicsShape(const float* vertices, int numvertices, const int* indices, int numIndices)
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{
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int shapeIndex = OpenGLGuiHelper::registerGraphicsShape(vertices,numvertices,indices,numIndices);
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if (shapeIndex>=0)
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{
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TinyRenderObjectData* swObj = new TinyRenderObjectData(m_swWidth,m_swHeight,m_rgbColorBuffer,m_depthBuffer);
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//swObj->registerMeshShape(vertices,numvertices,indices,numIndices);
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swObj->createCube(1,1,1);//MeshShape(vertices,numvertices,indices,numIndices);
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m_swRenderObjects.insert(shapeIndex,swObj);
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}
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return shapeIndex;
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}
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virtual int registerGraphicsInstance(int shapeIndex, const float* position, const float* quaternion, const float* color, const float* scaling)
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{
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int instanceId = OpenGLGuiHelper::registerGraphicsInstance(shapeIndex,position,quaternion,color,scaling);
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return instanceId ;
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}
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virtual void createCollisionShapeGraphicsObject(btCollisionShape* collisionShape)
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{
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OpenGLGuiHelper::createCollisionShapeGraphicsObject(collisionShape);
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}
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virtual void syncPhysicsToGraphics(const btDiscreteDynamicsWorld* rbWorld)
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{
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OpenGLGuiHelper::syncPhysicsToGraphics(rbWorld);
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}
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virtual void render(const btDiscreteDynamicsWorld* rbWorld)
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{
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OpenGLGuiHelper::render(rbWorld);
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//clear the color buffer
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TGAColor clearColor;
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clearColor.bgra[0] = 255;
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clearColor.bgra[1] = 255;
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clearColor.bgra[2] = 255;
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clearColor.bgra[3] = 255;
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clearBuffers(clearColor);
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ATTRIBUTE_ALIGNED16(float modelMat[16]);
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ATTRIBUTE_ALIGNED16(float viewMat[16]);
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CommonRenderInterface* render = getRenderInterface();
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render->getActiveCamera()->getCameraViewMatrix(viewMat);
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for (int i=0;i<rbWorld->getNumCollisionObjects();i++)
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{
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btCollisionObject* colObj = rbWorld->getCollisionObjectArray()[i];
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int colObjIndex = colObj->getUserIndex();
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int shapeIndex = colObj->getCollisionShape()->getUserIndex();
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if (colObjIndex>=0 && shapeIndex>=0)
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{
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TinyRenderObjectData* renderObj = 0;
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int* cptr = m_swInstances[colObjIndex];
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if (cptr)
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{
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int c = *cptr;
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TinyRenderObjectData** sptr = m_swRenderObjects[c];
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if (sptr)
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{
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renderObj = *sptr;
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}
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}
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//sync the object transform
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const btTransform& tr = colObj->getWorldTransform();
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tr.getOpenGLMatrix(modelMat);
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for (int i=0;i<4;i++)
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{
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for (int j=0;j<4;j++)
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{
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renderObj->m_modelMatrix[i][j] = modelMat[i+4*j];
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renderObj->m_viewMatrix[i][j] = viewMat[i+4*j];
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}
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}
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TinyRenderer::renderObject(*renderObj);
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}
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}
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for(int y=0;y<m_swHeight;++y)
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{
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unsigned char* pi=m_image+(y)*m_swWidth*3;
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for(int x=0;x<m_swWidth;++x)
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{
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const TGAColor& color = getFrameBuffer().get(x,y);
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pi[0] = color.bgra[2];
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pi[1] = color.bgra[1];
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pi[2] = color.bgra[0];
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pi+=3;
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}
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}
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render->activateTexture(m_textureHandle);
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render->updateTexture(m_textureHandle,m_image);
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static int counter=0;
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counter++;
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if (counter>10)
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{
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counter=0;
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getFrameBuffer().write_tga_file("/Users/erwincoumans/develop/bullet3/framebuf.tga",true);
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}
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float color[4] = {1,1,1,1};
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m_primRenderer->drawTexturedRect(0,0,m_swWidth, m_swHeight,color,0,0,1,1,true);
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}
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virtual void autogenerateGraphicsObjects(btDiscreteDynamicsWorld* rbWorld)
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{
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OpenGLGuiHelper::autogenerateGraphicsObjects(rbWorld);
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}
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};
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int main(int argc, char* argv[])
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{
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SimpleOpenGL3App* app = new SimpleOpenGL3App("Standalone Example (Software Renderer, TinyRenderer)",1024,768,true);
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int textureWidth = 640;
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int textureHeight = 480;
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SW_And_OpenGLGuiHelper gui(app,false,textureWidth,textureHeight,app->m_primRenderer);
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CommonExampleOptions options(&gui);
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CommonExampleInterface* example = StandaloneExampleCreateFunc(options);
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example->initPhysics();
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do
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{
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app->m_instancingRenderer->init();
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app->m_instancingRenderer->updateCamera();
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example->stepSimulation(1./60.);
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example->renderScene();
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app->drawGrid();
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app->swapBuffer();
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} while (!app->m_window->requestedExit());
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example->exitPhysics();
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delete example;
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delete app;
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return 0;
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}
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