void OnRender()
{
SetWindowTitle();
std::string sTitle = g_sWindowTitle;
glutSetWindowTitle(sTitle.c_str());
static GLfloat RedSurface[] = { 1.0f, 0.0f, 0.0f, 1.0f};
static GLfloat GreenSurface[] = { 0.0f, 1.0f, 0.0f, 1.0f};
static GLfloat BlueSurface[] = { 0.0f, 0.0f, 1.0f, 1.0f};
static GLfloat YellowSurface[] = { 1.0f, 1.0f, 0.0f, 1.0f};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear screen and depth buffer
glLoadIdentity(); // reset modelview matrix
//---------------
//Draw background
//---------------
glDisable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glBegin(GL_QUADS);
glColor3f(0.9F, 0.9F, 0.9F); glVertex2f( 1.0F, 1.0F);
glColor3f(0.9F, 0.9F, 0.9F); glVertex2f(-1.0F, 1.0F);
glColor3f(0.5F, 0.5F, 0.5F); glVertex2f(-1.0F, -1.0F);
glColor3f(0.5F, 0.5F, 0.5F); glVertex2f( 1.0F, -1.0F);
glEnd();
glEnable(GL_DEPTH_TEST);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
//----------------
// Applying camera
//----------------
hCamera.ApplyCamera();
glCallList(btmPlate);
glPushMatrix();
glCallList(g_glLtAxis);
glPopMatrix();
// Lights
GLfloat ambientLight[4] = {0.1f, 0.1f, 0.1f, 1.0f};
GLfloat diffuseLight[4] = {0.7f, 0.7f, 0.7f, 1.0f};
GLfloat lightPosition[4] = {200.0f, 200.0f, 100.0f, 0.0f};
glEnable(GL_DEPTH_TEST);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glEnable(GL_LIGHTING);
glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);
glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
glEnable(GL_LIGHT0);
if ( !g_bPause )
{
if ( g_bOneStep )
{
g_bOneStep = false;
g_bPause = true;
}
g_WorldSim.Update(g_dt);
g_CurFrame++;
}
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
g_WorldSim.Render(g_bWireframe);
//------------
// Draw texts
//------------
/* We are going to do some 2-D orthographic drawing. */
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
int w = g_Width;
int h = g_Height;
GLdouble size = (GLdouble)((w >= h) ? w : h) / 2.0;
GLdouble aspect;
if (w <= h) {
aspect = (GLdouble)h/(GLdouble)w;
glOrtho(-size, size, -size*aspect, size*aspect, -1000000.0, 1000000.0);
}
else {
aspect = (GLdouble)w/(GLdouble)h;
glOrtho(-size*aspect, size*aspect, -size, size, -1000000.0, 1000000.0);
}
/* Make the world and window coordinates coincide so that 1.0 in */
/* model space equals one pixel in window space. */
glScaled(aspect, aspect, 1.0);
glDisable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
std::string sInfo = "Current Algorithm(press 'a' to change): ";
sInfo.append(g_sWindowTitleInfo);
int linePos = 0;
DrawTextGlut(sInfo.c_str(), -g_Width/2 + 10, g_Height/2 - (linePos += 20));
// frame
char frame[10];
itoa(g_CurFrame, frame, 10);
sInfo = "Frame: ";
sInfo.append(frame);
DrawTextGlut(sInfo.c_str(), -g_Width/2 + 10, g_Height/2 - (linePos += 20));
//// batch
//char batch[5];
//itoa(g_WorldSim.m_RenderBatchIndex, batch, 10);
//sInfo = "Batch: ";
//sInfo.append(batch);
//DrawTextGlut(sInfo.c_str(), -g_Width/2 + 10, g_Height/2 - (linePos += 20));
//// toggle CPU/GPU
//if ( g_WorldSim.m_bGPU )
// sInfo = "GPU solver";
//else
// sInfo = "CPU solver";
//DrawTextGlut(sInfo.c_str(), -g_Width/2 + 10, g_Height/2 - (linePos += 20));
// help for keys
DrawTextGlut("space: advance one step", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
DrawTextGlut("'s': start or stop", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
DrawTextGlut("'r': toggle rotating", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
//DrawTextGlut("'c': reset", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
//DrawTextGlut("'b' : next batch", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
//DrawTextGlut("'g' : toggle CPU/GPU solver", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
DrawTextGlut("===========================================", -g_Width/2 + 10, g_Height/2 - (linePos += 20));
char str[100];
sprintf(str, "Penetration depth:%11.9f", g_WorldSim.m_pNarrowPhase->GetPairs()[0].penetrationDepth);
DrawTextGlut(str, -g_Width/2 + 10, g_Height/2 - (linePos += 20));
{
const CTransform& trans = g_WorldSim.m_pNarrowPhase->GetPairs()[0].pObjA->GetTransform();
sprintf(str, "ObjectA translation(%11.9f, %11.9f, %11.9f)", trans.GetTranslation().m_X, trans.GetTranslation().m_Y, trans.GetTranslation().m_Z);
DrawTextGlut(str, -g_Width/2 + 10, g_Height/2 - (linePos += 20));
sprintf(str, "ObjectA rotation(%11.9f, %11.9f, %11.9f, %11.9f)", trans.GetRotation().m_X, trans.GetRotation().m_Y, trans.GetRotation().m_Z, trans.GetRotation().m_W);
DrawTextGlut(str, -g_Width/2 + 10, g_Height/2 - (linePos += 20));
}
{
const CTransform& trans = g_WorldSim.m_pNarrowPhase->GetPairs()[0].pObjB->GetTransform();
sprintf(str, "ObjectB translation(%11.9f, %11.9f, %11.9f)", trans.GetTranslation().m_X, trans.GetTranslation().m_Y, trans.GetTranslation().m_Z);
DrawTextGlut(str, -g_Width/2 + 10, g_Height/2 - (linePos += 20));
sprintf(str, "ObjectB rotation(%11.9f, %11.9f, %11.9f, %11.9f)", trans.GetRotation().m_X, trans.GetRotation().m_Y, trans.GetRotation().m_Z, trans.GetRotation().m_W);
DrawTextGlut(str, -g_Width/2 + 10, g_Height/2 - (linePos += 20));
}
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glutSwapBuffers();
}
//===================
void RenderFunc()
//===================
{
static GLfloat RedSurface[] = { 1.0f, 0.0f, 0.0f, 1.0f};
static GLfloat GreenSurface[] = { 0.0f, 1.0f, 0.0f, 1.0f};
static GLfloat BlueSurface[] = { 0.0f, 0.0f, 1.0f, 1.0f};
static GLfloat YellowSurface[] = { 1.0f, 1.0f, 0.0f, 1.0f};
hCamera.Update();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear screen and depth buffer
glLoadIdentity(); // reset modelview matrix
//---------------
//Draw background
//---------------
glDisable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glBegin(GL_QUADS);
glColor3f(0.9F, 0.9F, 0.9F); glVertex2f( 1.0F, 1.0F);
glColor3f(0.9F, 0.9F, 0.9F); glVertex2f(-1.0F, 1.0F);
glColor3f(0.2F, 0.2F, 0.2F); glVertex2f(-1.0F, -1.0F);
glColor3f(0.2F, 0.2F, 0.2F); glVertex2f( 1.0F, -1.0F);
glEnd();
glEnable(GL_DEPTH_TEST);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
//----------------
// Applying camera
//----------------
hCamera.ApplyCamera();
glCallList(btmPlate);
//-------------------------------------------
// Rotate GL coordinate so that Z axis is up.
//-------------------------------------------
/*
Y Z
| |
| |
| ===> |
|________ X |________ Y
/ /
/ GL coordinate / Modeler coordinate
/ /
Z X
*/
//glRotatef(-90.0f, 0, 0, 1.0f);
//glRotatef(-90.0f, 0, 1.0f, 0);
//-------------
// Draw an axis
//-------------
glPushMatrix();
glCallList(g_glLtAxis);
glPopMatrix();
glEnable(GL_LIGHTING);
if ( !g_bPause )
g_BulletSim.Update();
g_BulletSim.Render(2);
glDisable(GL_LIGHTING);
}