vtkSmartPointer<vtkAlgorithm> GlyphMagnitudeColorMapping::createFilter(AbstractVisualizedData & visualizedData, unsigned int port)
{
if (port != 0)
{
return vtkSmartPointer<vtkPassThrough>::New();
}
const auto filterIt = m_filters.find(&visualizedData);
// Return already created filter (in this case, visualizedData is valid for this mapping)
if (filterIt != m_filters.end())
{
return filterIt->second;
}
// Check if the mapping can be applied to the provided visualization
const auto glyphMappingDataIt = m_glyphMappingData.find(static_cast<RenderedData3D *>(&visualizedData));
if (glyphMappingDataIt == m_glyphMappingData.end())
{
return vtkSmartPointer<vtkPassThrough>::New();
}
// Create the mapping pipeline
assert(glyphMappingDataIt->second);
auto & glyphMappingData = *glyphMappingDataIt->second;
auto norm = vtkSmartPointer<vtkVectorNorm>::New();
norm->SetInputConnection(glyphMappingData.vectorDataOutputPort());
auto assignVectors = vtkSmartPointer<vtkAssignAttribute>::New();
assignVectors->Assign(m_vectorName.toUtf8().data(), vtkDataSetAttributes::VECTORS, vtkAssignAttribute::POINT_DATA);
assignVectors->SetInputConnection(norm->GetOutputPort());
auto setArrayName = vtkSmartPointer<ArrayChangeInformationFilter>::New();
setArrayName->EnableRenameOn();
setArrayName->SetArrayName(s_normScalarsName);
setArrayName->SetAttributeType(vtkDataSetAttributes::SCALARS);
setArrayName->SetAttributeLocation(IndexType::points);
setArrayName->SetInputConnection(assignVectors->GetOutputPort());
m_filters[&visualizedData] = setArrayName;
return setArrayName;
}
//static variables
GLuint ab=0;
#define BUFFER_OFFSET(i) ((char *)NULL + (i))
int main ()
{
int i=0;
int ab=0;
float clr[3] = {0.0f, 0.3f, 0.6f};
float add[3] = {0.001f, 0.002f, 0.003f};
unsigned int position_attrib_idx = 0;
//GL stuff
SShader vertexShader;
SShader fragmentShader;
SShaderProgram program;
CPlatform platform;
Create(&platform, "", 2, 1, 1024, 768, 8, 8, 8, 8, 16, 8, 0);
//-------------------
//setup the shaders
CreateShader(&vertexShader, VERT, &pVertexShader, 1);
CreateShader(&fragmentShader, FRAG, &pFragmentShader, 1);
CreateShaderProgram(&program);
AddShaderToProgram(&program, &vertexShader);
AddShaderToProgram(&program, &fragmentShader);
SetAttributeLocation(&program, position_attrib_idx, "position"); //needs to be calleb before linking
LinkShaderProgram(&program);
glGenBuffers(1, &ab); //array buffer
//fill buffers
glBindBuffer(GL_ARRAY_BUFFER, ab);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
//-------------------
//tell openGL how to interperet the data
glBindBuffer(GL_ARRAY_BUFFER, ab);
glEnableVertexAttribArray(0);
glVertexAttribPointer(position_attrib_idx, 3, GL_FLOAT, GL_FALSE, 12, 0);
//set rendering states
glEnable(GL_CULL_FACE);
glClearColor(0, 0, 0, 0.0f); //alpha to 0, should make triangle appear over console
Start(&program); //even when glDeleteProgram is called the program won't be deleted until it is out of use
while (!IS_BUTTON_PRESSED(platform.m_keyboard.key[KB_ESC]))
{
Tick(&platform);
glClear(GL_COLOR_BUFFER_BIT);
SetVec3ByName(&program, "uColour", clr);
glDrawArrays( GL_TRIANGLES, 0, 3);
SwapBuffers(&platform);
for(i=0;i<3;i++)
{
clr[i]+=add[i];
if(clr[i]>1.0f)add[i]*=-1.0f;
if(clr[i]<0.0f)add[i]*=-1.0f;
}
}
Stop();
