C++ (Cpp) primitiveTypeOpenGL Examples

Example #1

//--------------------------------------------------------------------------------------------------
/// Render primitives in this primitive set using vertex arrays
/// 
/// \warning Requires at least OpenGL 1.5
//--------------------------------------------------------------------------------------------------
void PrimitiveSetIndexedUShort::render(OpenGLContext* oglContext) const
{
    CVF_CALLSITE_OPENGL(oglContext);
    CVF_TIGHT_ASSERT(BufferObjectManaged::supportedOpenGL(oglContext));

    if (m_indices.isNull())
    {
        return;
    }

    GLsizei numIndices = static_cast<GLsizei>(m_indices->size());
    if (numIndices <= 0) 
    {
        return;
    }

    const GLvoid* ptrOrOffset = 0;
    if (m_indicesBO.notNull() && m_indicesBO->isUploaded())
    {
        m_indicesBO->bindBuffer(oglContext);
    }
    else
    {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
        ptrOrOffset = m_indices->ptr();
    }

#ifdef CVF_OPENGL_ES
    glDrawElements(primitiveTypeOpenGL(), numIndices, GL_UNSIGNED_SHORT, ptrOrOffset);
#else
    glDrawRangeElements(primitiveTypeOpenGL(), m_minIndex, m_maxIndex, numIndices, GL_UNSIGNED_SHORT, ptrOrOffset);
#endif
}

Example #2

File: cvfPrimitiveSetIndexedUShortScoped.cpp Project: JacobStoren/ResInsight

//--------------------------------------------------------------------------------------------------
/// Render primitives in this primitive set using vertex arrays
/// 
/// \warning Requires at least OpenGL 1.5
//--------------------------------------------------------------------------------------------------
void PrimitiveSetIndexedUShortScoped::render(OpenGLContext* oglContext) const
{
    CVF_CALLSITE_OPENGL(oglContext);
    CVF_ASSERT(BufferObjectManaged::supportedOpenGL(oglContext));
    
    if (m_indices.isNull())
    {
        return;
    }

    GLsizei numIndices = static_cast<GLsizei>(m_elementCount);
    if (numIndices <= 0) 
    {
        return;
    }

    const GLvoid* ptrOrOffset = 0;
    if (m_indicesBO.notNull() && m_indicesBO->isUploaded())
    {
        m_indicesBO->bindBuffer(oglContext);
        ptrOrOffset = reinterpret_cast<GLvoid*>(m_firstElement*sizeof(GLushort));
    }
    else
    {
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
        ptrOrOffset = m_indices->ptr() + m_firstElement;
    }
    
    glDrawElements(primitiveTypeOpenGL(), numIndices, GL_UNSIGNED_SHORT, ptrOrOffset);

    CVF_CHECK_OGL(oglContext);
}