void OpenGLInitialization( void )
{
// We're drawing on a white background
glClearColor(1.0, 1.0, 1.0, 1.0);
// Convert our xyz curves into vertex arrays
for (uint i=0; i<curves.Size(); i++)
drawableCurves.Add( CurveToVertexArray( curves[i] ) );
// Covert our xyz curves into difference arrays. TODO: This is hard coded (our difference is
// computed from either curve #0 or curve #6)
for (uint i=0; i<curves.Size(); i++)
errorCurves.Add( DifferenceToVertexArray( curves[i], curves[ i<6?0:6 ] ) );
// Load the shaders to draw our curves; set some parameters
draw = new IGLUShaderProgram( "shaders/drawXYZCurve.vert.glsl",
"shaders/drawXYZCurve.geom.glsl",
"shaders/drawXYZCurve.frag.glsl" );
draw["xRange"] = vec2( 330.0f, 843.0f );
draw["yRange"] = vec2( -0.13f, 2.05f );
// Load the shader to draw our axes
drawAxes = new IGLUShaderProgram( "shaders/drawAxes.vert.glsl",
"shaders/drawAxes.frag.glsl" );
// Create the geometry for our axes
axes = new IGLUVertexArray();
float axesData[] = { -0.90f, -0.88f, 0.95f, -0.88f, // x-axis line
-0.88f, -0.88f, -0.88f, 0.95f, // y-axis line
-0.90f, -0.6513f, -0.88f, -0.6513f, // 0.25 tick
-0.90f, -0.4225f, -0.88f, -0.4225f, // 0.5 tick
-0.90f, -0.1938f, -0.88f, -0.1938f, // 0.75 tick
-0.90f, 0.035f, -0.88f, 0.035f, // 1.0 tick
-0.90f, 0.2638f, -0.88f, 0.2638f, // 1.25 tick
-0.90f, 0.4925f, -0.88f, 0.4925f, // 1.5 tick
-0.90f, 0.7213f, -0.88f, 0.7213f, // 1.75 tick
-0.90f, 0.95f, -0.88f, 0.95f, // 2.0 tick
-0.7243f, -0.88f, -0.7243f, -0.91f, // 400 nm tick
-0.5296f, -0.88f, -0.5296f, -0.91f, // 450 nm tick
-0.3349f, -0.88f, -0.3349f, -0.91f, // 500 nm tick
-0.1402f, -0.88f, -0.1402f, -0.91f, // 550 nm tick
0.0545f, -0.88f, 0.0545f, -0.91f, // 600 nm tick
0.24915f, -0.88f, 0.24915f, -0.91f, // 650 nm tick
0.4438f, -0.88f, 0.4438f, -0.91f, // 700 nm tick
0.6385f, -0.88f, 0.6385f, -0.91f, // 750 nm tick
0.8332f, -0.88f, 0.8332f, -0.91f, // 800 nm tick
};
axes->SetVertexArray( sizeof( axesData ), axesData );
axes->EnableAttribute( IGLU_ATTRIB_VERTEX, 2, GL_FLOAT );
}
IGLUVertexArray *iglu::IGLUGeometry::CreateQuad( uint type, uint matlid )
{
float *vptr = xyplane;
if ( type & IGLU_GEOM_XZ_PLANE ) vptr = xzplane;
if ( type & IGLU_GEOM_YZ_PLANE ) vptr = yzplane;
IGLUVertexArray::Ptr tmp = new IGLUVertexArray();
tmp->SetVertexArray( sizeof( xyplane ), vptr, IGLU_STATIC|IGLU_DRAW );
tmp->EnableAttribute( IGLU_ATTRIB_VERTEX, 3, GL_FLOAT, 9 * sizeof(float), BUFFER_OFFSET(6*sizeof(float)) );
if (type & IGLU_GEOM_USE_NORMAL)
tmp->EnableAttribute( IGLU_ATTRIB_NORMAL, 3, GL_FLOAT, 9 * sizeof(float), BUFFER_OFFSET(3*sizeof(float)) );
if (type & IGLU_GEOM_USE_TEXCOORD)
tmp->EnableAttribute( IGLU_ATTRIB_TEXCOORD, 2, GL_FLOAT, 9 * sizeof(float), BUFFER_OFFSET(1*sizeof(float)) );
return tmp;
}
// Do a pointwise difference between two XYZ curves and store into a renderable vertex array
IGLUVertexArray::Ptr DifferenceToVertexArray( XYZAbstract *approx, XYZAbstract *curve )
{
IGLUVertexArray::Ptr vArr = new IGLUVertexArray();
float *arrData = (float *)malloc( sizeof(float) * 4 * 471 );
float *fptr = arrData;
for (int i=360; i<=830; i++)
{
*(fptr++) = float(i);
*(fptr++) = approx->X(float(i))-curve->X(float(i));
*(fptr++) = approx->Y(float(i))-curve->Y(float(i));
*(fptr++) = approx->Z(float(i))-curve->Z(float(i));
}
vArr->SetVertexArray( sizeof(float) * 4 * 471, arrData );
vArr->EnableAttribute( IGLU_ATTRIB_VERTEX, 4, GL_FLOAT );
free( arrData );
return vArr;
}
void VORApp::Display()
{
#ifdef TEST
_cpuTimer->Start();
_gpuTimer->Start();
#endif
_mirrorTransforms[0] *= IGLUMatrix4x4::Rotate(10,vec3(0,1,0));
// Start timing this frame draw
_frameRate->StartFrame();
// Clear the screen
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
size_t frustumSize = 0;
size_t size = VirtualFrustumsCulling(frustumSize);
#ifdef TEST
_cpuTimer->Tick();
_gpuTimer->Tick();
printf("VirtualFrustums Culling gpu: %lf cpu: %lf \n", _gpuTimer->Tick(), _cpuTimer->Tick());
#endif
//size_t size = CPUVirtualFrustumsCulling(frustumSize);
//draw stencil
{
_mirrorStencilFBO->Bind();
_mirrorStencilFBO->Clear();
_shaders[3]->Enable();
_shaders[3]["project"] = _camera->GetProjectionMatrix();
_shaders[3]["model"] = _mirrorTransforms[0];
_shaders[3]["view"] = _camera->GetViewMatrix();
_mirrorObjs[0]->GetVertexArray()->Bind();
_mirrorElementBuffer->Bind();
//_mirrorObjs[0]->GetVertexArray()->GetElementArray()->Bind();
glDrawElements(GL_TRIANGLES,frustumSize*3,GL_UNSIGNED_INT,0);
//_mirrorObjs[0]->GetVertexArray()->GetElementArray()->Unbind();
_mirrorElementBuffer->Unbind();
_mirrorObjs[0]->GetVertexArray()->Unbind();
_shaders[3]->Disable();
_mirrorStencilFBO->Unbind();
/* IGLUDraw::Fullscreen( _mirrorStencilFBO[IGLU_COLOR0], 0 );
return; */
}
_mirrorFBO->Bind();
_mirrorFBO->Clear();
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
for(int i=0; i<_objReaders.size(); i++)
{
_shaders[2]->Enable();
_shaders[2]["project"] = _camera->GetProjectionMatrix();
_shaders[2]["view"] = _camera->GetViewMatrix();
_shaders[2]["model"] = _objTransforms[i];
_shaders[2]["mirrorModel"] = _mirrorTransforms[0];
_shaders[2]["InstanceData"] = _instanceDataTex;
_shaders[2]["lightIntensity" ] = float(1);
_shaders[2]["matlInfoTex"] = IGLUOBJMaterialReader::s_matlCoefBuf;
_shaders[2]["matlTextures"] = IGLUOBJMaterialReader::s_matlTexArray;
_shaders[2]["lightColor"] = vec3(1.0);
_shaders[2]["resX"] = _camera->GetResX();
_shaders[2]["resY"] = _camera->GetResY();
_shaders[2]["stencilTexture"] = _mirrorStencilFBO[0];
IGLUVertexArray::Ptr vao = _objReaders[i]->GetVertexArray();
vao->Bind();
vao->GetElementArray()->Bind();
_indirectDrawBuffer->Bind();
glMultiDrawElementsIndirect( GL_TRIANGLES, GL_UNSIGNED_INT, NULL, size, 0);
_indirectDrawBuffer->Unbind();
vao->GetElementArray()->Unbind();
vao->Unbind();
_shaders[2]->Disable();
}
_mirrorFBO->Unbind();
/* IGLUDraw::Fullscreen( _mirrorFBO[IGLU_COLOR0], 0 );
return;*/
_mirrorTexShader->Enable();
_mirrorTexShader["project"] = _camera->GetProjectionMatrix();
_mirrorTexShader["modelview"] = _camera->GetViewMatrix() *_mirrorTransforms[0];
_mirrorTexShader["mtexture"] = _mirrorFBO[0];
_mirrorObjs[0]->GetVertexArray()->Bind();
_mirrorElementBuffer->Bind();
glDrawElements(GL_TRIANGLES,frustumSize*3,GL_UNSIGNED_INT,0);
_mirrorElementBuffer->Unbind();
_mirrorObjs[0]->GetVertexArray()->Unbind();
_mirrorTexShader->Disable();
for(int i=0; i<_objReaders.size(); i++)
{
_objShader->Enable();
_objShader["project"] = _camera->GetProjectionMatrix();
_objShader["model"] = _objTransforms[i];
_objShader["view"] = _camera->GetViewMatrix();
_objShader["lightIntensity" ] = float(1);
_objShader["matlInfoTex"] = IGLUOBJMaterialReader::s_matlCoefBuf;
_objShader["matlTextures"] = IGLUOBJMaterialReader::s_matlTexArray;
_objShader["lightColor"] = _lightColor;
_objReaders[i]->GetVertexArray()->Bind();
_objReaders[i]->GetVertexArray()->GetElementArray()->Bind();
glDrawElements(GL_TRIANGLES,_objReaders[i]->GetTriangleCount()*3,GL_UNSIGNED_INT,0);
_objReaders[i]->GetVertexArray()->GetElementArray()->Unbind();
_objReaders[i]->GetVertexArray()->Unbind();
_objShader->Disable();
}
// Draw the framerate on the screen
char buf[32];
sprintf( buf, "%.1f fps", _frameRate->EndFrame() );
IGLUDraw::DrawText( IGLU_FONT_VARIABLE, 0, 0, buf );
}
// Draw
void display ( void )
{
int j=0;
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glLineWidth( GLfloat(lineWidth) );
if (!useErrors)
{
// Bind and setup the shader
draw->Enable();
draw["xRange"] = vec2( 330.0f, 843.0f );
draw["yRange"] = vec2( -0.13f, 2.05f );
draw["useXYZ"] = vec3( displayX ? 1.0f : 0.0f,
displayY ? 1.0f : 0.0f,
displayZ ? 1.0f : 0.0f );
// For each curve, check if it's selected to be display, if so, draw it
for (uint i=0; i<drawableCurves.Size(); i++)
{
// Check if this curve was selected to be drawn
if ( curveSelection[i]->GetValue() )
{
draw["xColor"] = colorArr[j++];
draw["yColor"] = colorArr[j++];
draw["zColor"] = colorArr[j++];
drawableCurves[i]->DrawArrays( GL_LINE_STRIP, 0, 471 );
}
}
draw->Disable();
// After drawing the curve, draw the axes
drawAxes->Enable();
axes->DrawArrays( GL_LINES, 0, 38 );
drawAxes->Disable();
}
else
{
// Bind and setup the shader
draw->Enable();
draw["xRange"] = vec2( 330.0f, 843.0f );
draw["yRange"] = vec2( -0.25f, 0.25f );
draw["useXYZ"] = vec3( displayX ? 1.0f : 0.0f,
displayY ? 1.0f : 0.0f,
displayZ ? 1.0f : 0.0f );
// For each curve, check if it's selected to be display, if so, draw it
for (uint i=0; i<errorCurves.Size(); i++)
{
// Check if this curve was selected to be drawn
if ( curveSelection[i]->GetValue() )
{
draw["xColor"] = colorArr[j++];
draw["yColor"] = colorArr[j++];
draw["zColor"] = colorArr[j++];
errorCurves[i]->DrawArrays( GL_LINE_STRIP, 0, 471 );
}
}
draw->Disable();
}
// Draw the labels
for (int i=0; i<10; i++)
IGLUDraw::DrawColorText( IGLU_FONT_VARIABLE,
int(textOffsetFactor.X()*labels[i].x),
int(textOffsetFactor.Y()*labels[i].y),
color::Gray80, labels[i].name, textOffsetFactor.X() );
}