Model::Model(Geometry* geometry, Textures* textures, ShaderProgram* shaderProgram) :
m_geometry(geometry),
m_shaderProgram(shaderProgram),
m_textures(textures)
{
glGenVertexArrays ( 1, &m_vaoId );
glBindVertexArray ( m_vaoId );
// bind all geometry buffers
for(int i=0; i < m_geometry->size(); ++i)
{
m_geometry->get(i)->bind();
m_geometry->get(i)->bufferData();
}
// Set up the Vertex attribute pointer for the vVertex attribute
for( auto attr : m_shaderProgram->attributeLocList )
{
GeometryBuffer* buff = m_geometry->get( attr.first );
buff->bind();
glEnableVertexAttribArray( attr.second.index );
glVertexAttribPointer(
attr.second.index, // Attribute location
attr.second.size, // Number of elements per vertex, here (x,y,z), so 3
attr.second.type, // Data type of each element
attr.second.normalized,// Normalised?
attr.second.stride, // Stride
attr.second.pointer // Offset
);
}
// add uniforms for every texture
for (int i = 0; i <m_textures->size(); ++i)
{
const std::string textureUniformName = m_textures->textureName( i );
if ( textureUniformName != "" )
{
m_shaderProgram->addUniform( textureUniformName );
}
}
glBindVertexArray ( 0 );
}
void Model::draw(Camera * camera)
{
shaderProgram()->setUniformMatrix4fv("projection", camera->projectionMatrix());
shaderProgram()->setUniformMatrix4fv("view", camera->transformationMatrix());
shaderProgram()->setUniformMatrix4fv("model", transformationMatrix());
bindTextures();
shaderProgram()->use();
if (isWireframeMode())
{
// wireframe mode
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
}
glBindVertexArray ( m_vaoId );
if (geometry()->isExist("index"))
{
GeometryBuffer *indices = geometry()->get("index");
indices->bind();
glDrawElements(GL_TRIANGLES, indices->size(), GL_UNSIGNED_INT, 0);
} else {
glDrawArrays ( GL_TRIANGLES, 0, geometry()->get("vertex")->size() );
}
glBindVertexArray ( 0 );
if (isWireframeMode())
{
// wireframe mode
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
}
shaderProgram()->disable();
unbindTextures();
}