bullet3/examples/TinyRenderer/main.cpp

#include "OpenGLWindow/SimpleOpenGL3App.h"
#include "Bullet3Common/b3Quaternion.h"
#include "Bullet3Common/b3CommandLineArgs.h"
#include "Bullet3Common/b3Transform.h"

#include "assert.h"
#include <stdio.h>

char* gVideoFileName = 0;
char* gPngFileName = 0;

static b3WheelCallback sOldWheelCB = 0;
static b3ResizeCallback sOldResizeCB = 0;
static b3MouseMoveCallback sOldMouseMoveCB = 0;
static b3MouseButtonCallback sOldMouseButtonCB = 0;
static b3KeyboardCallback sOldKeyboardCB = 0;
//static b3RenderCallback sOldRenderCB = 0;

float gWidth = 0 ;
float gHeight = 0;

void MyWheelCallback(float deltax, float deltay)
{
	if (sOldWheelCB)
		sOldWheelCB(deltax,deltay);
}
void MyResizeCallback( float width, float height)
{
    gWidth = width;
    gHeight = height;
    
	if (sOldResizeCB)
		sOldResizeCB(width,height);
}
void MyMouseMoveCallback( float x, float y)
{
	printf("Mouse Move: %f, %f\n", x,y);

	if (sOldMouseMoveCB)
		sOldMouseMoveCB(x,y);
}
void MyMouseButtonCallback(int button, int state, float x, float y)
{
	if (sOldMouseButtonCB)
		sOldMouseButtonCB(button,state,x,y);
}


void MyKeyboardCallback(int keycode, int state)
{
	//keycodes are in examples/CommonInterfaces/CommonWindowInterface.h
	//for example B3G_ESCAPE for escape key
	//state == 1 for pressed, state == 0 for released.
	// use app->m_window->isModifiedPressed(...) to check for shift, escape and alt keys
	printf("MyKeyboardCallback received key:%c in state %d\n",keycode,state);
	if (sOldKeyboardCB)
		sOldKeyboardCB(keycode,state);
}
#include "TinyRenderer.h"

int main(int argc, char* argv[])
{
    b3CommandLineArgs myArgs(argc,argv);

  
    
	SimpleOpenGL3App* app = new SimpleOpenGL3App("SimpleOpenGL3App",640,480,true);
	
	app->m_instancingRenderer->getActiveCamera()->setCameraDistance(13);
	app->m_instancingRenderer->getActiveCamera()->setCameraPitch(0);
	app->m_instancingRenderer->getActiveCamera()->setCameraTargetPosition(0,0,0);
	sOldKeyboardCB = app->m_window->getKeyboardCallback();	
	app->m_window->setKeyboardCallback(MyKeyboardCallback);
	sOldMouseMoveCB = app->m_window->getMouseMoveCallback();
	app->m_window->setMouseMoveCallback(MyMouseMoveCallback);
	sOldMouseButtonCB = app->m_window->getMouseButtonCallback();
	app->m_window->setMouseButtonCallback(MyMouseButtonCallback);
	sOldWheelCB = app->m_window->getWheelCallback();
	app->m_window->setWheelCallback(MyWheelCallback);
	sOldResizeCB = app->m_window->getResizeCallback();
	app->m_window->setResizeCallback(MyResizeCallback);
  
    int textureWidth = gWidth;
    int textureHeight = gHeight;
    
	TinyRenderObjectData renderData(textureWidth, textureHeight);//, "african_head/african_head.obj");//floor.obj");
	
	//renderData.loadModel("african_head/african_head.obj");
	//renderData.loadModel("floor.obj");
	
	renderData.createCube(1,1,1);
    
    
    myArgs.GetCmdLineArgument("mp4_file",gVideoFileName);
    if (gVideoFileName)
        app->dumpFramesToVideo(gVideoFileName);

    myArgs.GetCmdLineArgument("png_file",gPngFileName);
    char fileName[1024];
    
 
    
    unsigned char*	image=new unsigned char[textureWidth*textureHeight*4];
        
    
    int textureHandle = app->m_renderer->registerTexture(image,textureWidth,textureHeight);

    int cubeIndex = app->registerCubeShape(1,1,1);
    
    b3Vector3 pos = b3MakeVector3(0,0,0);
    b3Quaternion orn(0,0,0,1);
    b3Vector3 color=b3MakeVector3(1,0,0);
    b3Vector3 scaling=b3MakeVector3 (1,1,1);
    app->m_renderer->registerGraphicsInstance(cubeIndex,pos,orn,color,scaling);
    app->m_renderer->writeTransforms();
    
	do
	{
	    static int frameCount = 0;
		frameCount++;
		if (gPngFileName)
        {
            printf("gPngFileName=%s\n",gPngFileName);

            sprintf(fileName,"%s%d.png",gPngFileName,frameCount++);
            app->dumpNextFrameToPng(fileName);
        }
        
       	app->m_instancingRenderer->init();
		app->m_instancingRenderer->updateCamera();

   ///clear the color and z (depth) buffer
        for(int y=0;y<textureHeight;++y)
        {
            unsigned char*	pi=image+(y)*textureWidth*3;
            for(int x=0;x<textureWidth;++x)
            {
                
                TGAColor color;
                color.bgra[0] = 255;
                color.bgra[1] = 255;
                color.bgra[2] = 255;
                color.bgra[3] = 255;
                
                renderData.m_rgbColorBuffer.set(x,y,color);
				renderData.m_depthBuffer[x+y*textureWidth] = -1e30f;
            }
        }
        
        float projMat[16];
        app->m_instancingRenderer->getActiveCamera()->getCameraProjectionMatrix(projMat);
        float viewMat[16];
        app->m_instancingRenderer->getActiveCamera()->getCameraViewMatrix(viewMat);
        B3_ATTRIBUTE_ALIGNED16(float modelMat[16]);
        
        //sync the object transform
        b3Transform tr;
        tr.setIdentity();
        static float posUp = 0.f;
       // posUp += 0.001;
        b3Vector3 org = b3MakeVector3(0,posUp,0);
        tr.setOrigin(org);
        tr.getOpenGLMatrix(modelMat);
        
        for (int i=0;i<4;i++)
        {
            for (int j=0;j<4;j++)
            {
                renderData.m_viewMatrix[i][j] = viewMat[i+4*j];
                renderData.m_modelMatrix[i][j] = modelMat[i+4*j];
            }
        }
        
        //render the object
        TinyRenderer::renderObject(renderData);
  
        #if 1
         //update the texels of the texture using a simple pattern, animated using frame index
        for(int y=0;y<textureHeight;++y)
        {
            unsigned char*	pi=image+(y)*textureWidth*3;
            for(int x=0;x<textureWidth;++x)
            {
                
                TGAColor color = renderData.m_rgbColorBuffer.get(x,y);
				pi[0] = color.bgra[2];
				pi[1] = color.bgra[1];
				pi[2] = color.bgra[0];
				pi[3] = 255;
                pi+=3;
            }
        }
        #else
        
        //update the texels of the texture using a simple pattern, animated using frame index
        for(int y=0;y<textureHeight;++y)
        {
            const int	t=(y+frameCount)>>4;
            unsigned char*	pi=image+y*textureWidth*3;
            for(int x=0;x<textureWidth;++x)
            {
				TGAColor color = renderData.m_rgbColorBuffer.get(x,y);

                const int		s=x>>4;
                const unsigned char	b=180;					
                unsigned char			c=b+((s+(t&1))&1)*(255-b);
				pi[0]=pi[1]=pi[2]=pi[3]=c;
				pi+=3;
            }
        }
        #endif 
        
    
        app->m_renderer->activateTexture(textureHandle);
        app->m_renderer->updateTexture(textureHandle,image);
        
        float color[4] = {1,1,1,1};
        app->m_primRenderer->drawTexturedRect(0,0,gWidth/3,gHeight/3,color,0,0,1,1,true);
        
		
	
        app->m_renderer->renderScene();
		app->drawGrid();
		char bla[1024];
		sprintf(bla,"Simple test frame %d", frameCount);

		app->drawText(bla,10,10);
		app->swapBuffer();
	} while (!app->m_window->requestedExit());


	delete app;
	return 0;
}