GeometryBufferPtr Gizmo::generateLines()
{
static const float OriginOffset = 0.01f;
// Create a new VBO and upload triangle data
GeometryBufferPtr gb = AllocateThis(GeometryBuffer);
// Vertex position data
std::vector< Vector3 > pos;
// X axis
pos.push_back( Vector3::Zero );
pos.push_back( Vector3::UnitX / 2.0f );
// Y axis
pos.push_back( Vector3::UnitY*OriginOffset );
pos.push_back( Vector3::UnitY / 2.0f );
// Z axis
pos.push_back( Vector3::Zero );
pos.push_back( Vector3::UnitZ / 2.0f );
// Vertex color data
std::vector< Vector3 > colors;
generateLinesColors(colors);
// Vertex buffer setup
gb->set( VertexAttribute::Position, pos );
gb->set( VertexAttribute::Color, colors );
return gb;
}
GeometryBufferPtr GizmoRotate::generateCircles()
{
// Vertex data
std::vector< Vector3 > pos;
std::vector< Vector3 > colors;
Matrix4x3 transform;
// X axis
std::vector< Vector3 > posX;
generateCircle(posX, SLICES);
generateColors(colors, X);
transform = Matrix4x3::createScale( Vector3(0.4f) );
TransformVertices(pos, posX, transform);
// Y axis
std::vector< Vector3 > posY;
generateCircle(posY, SLICES);
generateColors(colors, Y);
transform = Matrix4x3::createScale( Vector3(0.4f) );
transform = transform*Matrix4x3::createRotation( EulerAngles(0, 90, 0) );
TransformVertices(pos, posY, transform);
// Z axis
std::vector< Vector3 > posZ;
generateCircle(posZ, SLICES);
generateColors(colors, Z);
transform = Matrix4x3::createScale( Vector3(0.4f) );
transform = transform*Matrix4x3::createRotation( EulerAngles(90, 0, 0) );
TransformVertices(pos, posZ, transform);
// Translate it a bit.
transform = Matrix4x3::createTranslation( Vector3::UnitY * 0.5f );
for( uint i = 0; i < pos.size(); i++ )
{
Vector3& v = pos[i];
v = transform*v;
}
// Vertex buffer setup
GeometryBufferPtr gb = AllocateHeap(GeometryBuffer);
assert( pos.size() == colors.size() );
gb->set( VertexAttribute::Position, pos );
gb->set( VertexAttribute::Color, colors );
return gb;
}
