///
//Renders the OctTree
//
//Parameters:
// nodeToRender: THe node of the oct tree being rendered
// modelViewProjectionMatrix: THe modelViewProjectionMatrix to send to the shader
// viewMatrix: THe view matrix of the camera
// projectionMatrix: The projection matrix of the camera
// mesh: The mesh to draw as a representation of the oct tree
void RenderingManager_RenderOctTree(OctTree_Node* nodeToRender, Matrix* modelViewProjectionMatrix, Matrix* viewMatrix, Matrix* projectionMatrix, Mesh* mesh)
{
//Only render trees which contain objects?
//If this node has children, draw them too
if(nodeToRender->children != NULL)
{
for(int i = 0; i < 8; i++)
{
RenderingManager_RenderOctTree(nodeToRender->children + i, modelViewProjectionMatrix, viewMatrix, projectionMatrix, mesh);
}
}
else
{
//Set modelViewMatrix to identity
Matrix_ToIdentity(modelViewProjectionMatrix);
//Set the scale values of the modelViewProjection Matrix
*Matrix_Index(modelViewProjectionMatrix, 0, 0) = nodeToRender->right;
*Matrix_Index(modelViewProjectionMatrix, 1, 1) = nodeToRender->top;
*Matrix_Index(modelViewProjectionMatrix, 2, 2) = nodeToRender->front;
//Set modelMatrix uniform
glProgramUniformMatrix4fv(renderingBuffer->shaderPrograms[0]->shaderProgramID, renderingBuffer->shaderPrograms[0]->modelMatrixLocation, 1, GL_TRUE, modelViewProjectionMatrix->components);
//Construct modelViewProjection
Matrix_TransformMatrix(viewMatrix, modelViewProjectionMatrix);
Matrix_TransformMatrix(projectionMatrix, modelViewProjectionMatrix);
//Set modelViewProjectionMatrix uniform
glProgramUniformMatrix4fv(renderingBuffer->shaderPrograms[0]->shaderProgramID, renderingBuffer->shaderPrograms[0]->modelViewProjectionMatrixLocation, 1, GL_TRUE, modelViewProjectionMatrix->components);
//Render node
Mesh_Render(mesh, GL_LINES);
}
}
///
//Initializes a matrices components and sets as identity matrix
//
//Parameters:
// mat: Matrix to initialize
void Matrix_Initialize(Matrix* mat, const uint16_t numRows, const uint16_t numCols)
{
mat->numRows = numRows;
mat->numColumns = numCols;
mat->components = (float*)calloc(sizeof(float), mat->numRows * mat->numColumns);
if (mat->numRows == mat->numColumns)
{
Matrix_ToIdentity(mat);
}
}
