bullet3/examples/SimpleOpenGL3/main.cpp

#include "OpenGLWindow/SimpleOpenGL3App.h"
#include "Bullet3Common/b3Quaternion.h"
#include "Bullet3Common/b3CommandLineArgs.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 = 1024;
float gHeight = 768;

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);
}


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


	SimpleOpenGL3App* app = new SimpleOpenGL3App("SimpleOpenGL3App",gWidth,gHeight,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);
  

	myArgs.GetCmdLineArgument("mp4_file",gVideoFileName);
    if (gVideoFileName)
        app->dumpFramesToVideo(gVideoFileName);

    myArgs.GetCmdLineArgument("png_file",gPngFileName);
    char fileName[1024];
    
    int textureWidth = 128;
    int textureHeight = 128;
    
    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);
        }

        
        
        //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)
            {
                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;
            }
        }
    
        app->m_renderer->activateTexture(textureHandle);
        app->m_renderer->updateTexture(textureHandle,image);
        
        float color[4] = {255,1,1,1};
        app->m_primRenderer->drawTexturedRect(100,200,gWidth/2-50,gHeight/2-50,color,0,0,1,1,true);
        
		
		app->m_instancingRenderer->init();
		app->m_instancingRenderer->updateCamera();

        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;

	delete[] image;
	return 0;
}