strafe-client/src/primitives.rs

pub fn the_unit_cube_lol() -> obj::ObjData{
	generate_partial_unit_cube([Some(glam::Affine2::IDENTITY);6])
}
pub fn generate_partial_unit_cube(face_transforms:[Option<glam::Affine2>;6])->obj::ObjData{
	let default_polys=[
		// right (1, 0, 0)
		obj::SimplePolygon(vec![
			obj::IndexTuple(6,Some(2),Some(0)),
			obj::IndexTuple(5,Some(1),Some(0)),
			obj::IndexTuple(2,Some(0),Some(0)),
			obj::IndexTuple(1,Some(3),Some(0)),
		]),
		// top (0, 1, 0)
		obj::SimplePolygon(vec![
			obj::IndexTuple(5,Some(3),Some(1)),
			obj::IndexTuple(4,Some(2),Some(1)),
			obj::IndexTuple(3,Some(1),Some(1)),
			obj::IndexTuple(2,Some(0),Some(1)),
		]),
		// back (0, 0, 1)
		obj::SimplePolygon(vec![
			obj::IndexTuple(0,Some(3),Some(2)),
			obj::IndexTuple(1,Some(2),Some(2)),
			obj::IndexTuple(2,Some(1),Some(2)),
			obj::IndexTuple(3,Some(0),Some(2)),
		]),
		// left (-1, 0, 0)
		obj::SimplePolygon(vec![
			obj::IndexTuple(0,Some(2),Some(3)),
			obj::IndexTuple(3,Some(1),Some(3)),
			obj::IndexTuple(4,Some(0),Some(3)),
			obj::IndexTuple(7,Some(3),Some(3)),
		]),
		// bottom (0,-1, 0)
		obj::SimplePolygon(vec![
			obj::IndexTuple(1,Some(1),Some(4)),
			obj::IndexTuple(0,Some(0),Some(4)),
			obj::IndexTuple(7,Some(3),Some(4)),
			obj::IndexTuple(6,Some(2),Some(4)),
		]),
		// front (0, 0,-1)
		obj::SimplePolygon(vec![
			obj::IndexTuple(4,Some(1),Some(5)),
			obj::IndexTuple(5,Some(0),Some(5)),
			obj::IndexTuple(6,Some(3),Some(5)),
			obj::IndexTuple(7,Some(2),Some(5)),
		]),
	];
	let default_verts=[[0.0,0.0],[1.0,0.0],[1.0,1.0],[0.0,1.0]];
	//generate transformed vertices
	let mut generated_verts=Vec::new();
	let mut transforms=Vec::new();
	let mut generated_polys=Vec::new();
	for (i,maybe_transform) in face_transforms.iter().enumerate(){
		if let Some(transform)=maybe_transform{
			let transform_index=if let Some(transform_index)=transforms.iter().position(|&t|t==transform){
				transform_index
			}else{
				//create new transform_index
				let transform_index=transforms.len();
				transforms.push(transform);
				for vert in default_verts{
					generated_verts.push(*transform.transform_point2(glam::vec2(vert[0],vert[1])).as_ref());
				}
				transform_index
			};
			generated_polys.push(obj::SimplePolygon(
				default_polys[i].0.iter().map(
					|&v|obj::IndexTuple(v.0,Some(v.1.unwrap()+4*transform_index),v.2)
				).collect()
			));
		}
	}
	obj::ObjData{
		position: vec![
			[-1.,-1., 1.],//0 left bottom back
			[ 1.,-1., 1.],//1 right bottom back
			[ 1., 1., 1.],//2 right top back
			[-1., 1., 1.],//3 left top back
			[-1., 1.,-1.],//4 left top front
			[ 1., 1.,-1.],//5 right top front
			[ 1.,-1.,-1.],//6 right bottom front
			[-1.,-1.,-1.],//7 left bottom front
		],
		texture: generated_verts,
		normal: vec![
			[ 1., 0., 0.],//AabbFace::Right
			[ 0., 1., 0.],//AabbFace::Top
			[ 0., 0., 1.],//AabbFace::Back
			[-1., 0., 0.],//AabbFace::Left
			[ 0.,-1., 0.],//AabbFace::Bottom
			[ 0., 0.,-1.],//AabbFace::Front
		],
		objects: vec![obj::Object{
			name: "Unit Cube".to_owned(),
			groups: vec![obj::Group{
				name: "Cube Vertices".to_owned(),
				index: 0,
				material: None,
				polys: generated_polys,
			}]
		}],
		material_libs: Vec::new(),
	}
}