add ImplicitCloth demo, by Stan Melax
add SimpleOpenGL3App, used in ImplicitCloth demo. The Bullet 3.x demos should use this as a template, it will clean up some of the mess.
This commit is contained in:
erwincoumans
215
btgui/OpenGLWindow/SimpleOpenGL3App.cpp
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215
btgui/OpenGLWindow/SimpleOpenGL3App.cpp
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#include "SimpleOpenGL3App.h"
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#ifdef __APPLE__
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#include "OpenGLWindow/MacOpenGLWindow.h"
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#else
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#include "GL/glew.h"
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#ifdef _WIN32
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#include "OpenGLWindow/Win32OpenGLWindow.h"
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#else
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//let's cross the fingers it is Linux/X11
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#include "OpenGLWindow/X11OpenGLWindow.h"
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#endif //_WIN32
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#endif//__APPLE__
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#include "OpenGLWindow/GLPrimitiveRenderer.h"
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#include "OpenGLWindow/GLInstancingRenderer.h"
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#include "Bullet3Common/b3Vector3.h"
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#include "../btgui/OpenGLTrueTypeFont/fontstash.h"
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#include "../btgui/OpenGLWindow/TwFonts.h"
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struct SimpleInternalData
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{
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GLuint m_fontTextureId;
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};
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static SimpleOpenGL3App* gApp=0;
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void SimpleResizeCallback( float width, float height)
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{
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gApp->m_instancingRenderer->resize(width,height);
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gApp->m_primRenderer->setScreenSize(width,height);
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}
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static GLuint BindFont(const CTexFont *_Font)
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{
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GLuint TexID = 0;
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glGenTextures(1, &TexID);
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glBindTexture(GL_TEXTURE_2D, TexID);
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glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
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glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, _Font->m_TexWidth, _Font->m_TexHeight, 0, GL_RED, GL_UNSIGNED_BYTE, _Font->m_TexBytes);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_NEAREST);
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glBindTexture(GL_TEXTURE_2D, 0);
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return TexID;
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}
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SimpleOpenGL3App::SimpleOpenGL3App( const char* title, int width,int height)
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{
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gApp = this;
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m_data = new SimpleInternalData;
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m_window = new b3gDefaultOpenGLWindow();
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b3gWindowConstructionInfo ci;
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ci.m_title = title;
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ci.m_width = width;
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ci.m_height = height;
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m_window->createWindow(ci);
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m_window->setWindowTitle(title);
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glClearColor(1,1,1,1);
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m_window->startRendering();
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#ifndef __APPLE__
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glewInit();
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#endif
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m_primRenderer = new GLPrimitiveRenderer(width,height);
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m_instancingRenderer = new GLInstancingRenderer(128*1024,4*1024*1024);
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m_instancingRenderer->init();
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m_instancingRenderer->resize(width,height);
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m_instancingRenderer->InitShaders();
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m_window->setMouseMoveCallback(b3DefaultMouseMoveCallback);
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m_window->setMouseButtonCallback(b3DefaultMouseButtonCallback);
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m_window->setKeyboardCallback(b3DefaultKeyboardCallback);
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m_window->setWheelCallback(b3DefaultWheelCallback);
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m_window->setResizeCallback(SimpleResizeCallback);
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TwGenerateDefaultFonts();
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m_data->m_fontTextureId = BindFont(g_DefaultNormalFont);
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}
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void SimpleOpenGL3App::drawText( const char* txt, int posX, int posY)
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{
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//
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//printf("str = %s\n",unicodeText);
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int xpos=0;
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int ypos=0;
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float dx;
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int measureOnly=0;
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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/*
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if (m_useTrueTypeFont)
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{
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float yoffset = 0.f;
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if (m_retinaScale==2.0f)
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{
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yoffset = -12;
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}
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Translate(r);
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sth_draw_text(m_font,
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1,m_fontScaling,
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r.x,r.y+yoffset,
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unicodeText,&dx, m_screenWidth,m_screenHeight,measureOnly,m_retinaScale);
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} else
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*/
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{
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//float width = 0.f;
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int pos=0;
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float color[]={0.2f,0.2,0.2f,1.f};
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D,m_data->m_fontTextureId);
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//float width = r.x;
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float extraSpacing = 0.;
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int startX = posX;
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int startY = posY;
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while (txt[pos])
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{
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int c = txt[pos];
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//r.h = g_DefaultNormalFont->m_CharHeight;
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//r.w = g_DefaultNormalFont->m_CharWidth[c]+extraSpacing;
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int endX = startX+g_DefaultNormalFont->m_CharWidth[c];
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int endY = startY+g_DefaultNormalFont->m_CharHeight;
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//Gwen::Rect rect = r;
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//Translate( rect );
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float currentColor[]={0.2f,0.2,0.2f,1.f};
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m_primRenderer->drawTexturedRect(startX, startY, endX, endY, currentColor,g_DefaultNormalFont->m_CharU0[c],g_DefaultNormalFont->m_CharV0[c],g_DefaultNormalFont->m_CharU1[c],g_DefaultNormalFont->m_CharV1[c]);
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//DrawTexturedRect(0,r,g_DefaultNormalFont->m_CharU0[c],g_DefaultNormalFont->m_CharV0[c],g_DefaultNormalFont->m_CharU1[c],g_DefaultNormalFont->m_CharV1[c]);
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// DrawFilledRect(r);
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startX = endX;
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//startY = endY;
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pos++;
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}
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glBindTexture(GL_TEXTURE_2D,0);
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}
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glDisable(GL_BLEND);
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}
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void SimpleOpenGL3App::drawGrid(int gridSize)
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{
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b3Vector3 gridColor = b3MakeVector3(0.5,0.5,0.5);
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for(int i=-gridSize;i<=gridSize;i++)
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{
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GLint err = glGetError();
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b3Assert(err==GL_NO_ERROR);
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m_instancingRenderer->drawLine(b3MakeVector3(float(i),0,float(-gridSize)),b3MakeVector3(float(i),0,float(gridSize)),gridColor);
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err = glGetError();
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b3Assert(err==GL_NO_ERROR);
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m_instancingRenderer->drawLine(b3MakeVector3(float(-gridSize),0,float(i)),b3MakeVector3(float(gridSize),0,float(i)),gridColor);
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}
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m_instancingRenderer->drawLine(b3MakeVector3(0,0,0),b3MakeVector3(1,0,0),b3MakeVector3(1,0,0),3);
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m_instancingRenderer->drawLine(b3MakeVector3(0,0,0),b3MakeVector3(0,1,0),b3MakeVector3(0,1,0),3);
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m_instancingRenderer->drawLine(b3MakeVector3(0,0,0),b3MakeVector3(0,0,1),b3MakeVector3(0,0,1),3);
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m_instancingRenderer->drawPoint(b3MakeVector3(1,0,0),b3MakeVector3(1,0,0),6);
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m_instancingRenderer->drawPoint(b3MakeVector3(0,1,0),b3MakeVector3(0,1,0),6);
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m_instancingRenderer->drawPoint(b3MakeVector3(0,0,1),b3MakeVector3(0,0,1),6);
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}
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SimpleOpenGL3App::~SimpleOpenGL3App()
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{
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delete m_primRenderer ;
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m_window->closeWindow();
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delete m_window;
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delete m_data ;
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}
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void SimpleOpenGL3App::swapBuffer()
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{
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m_window->endRendering();
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m_window->startRendering();
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}
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