♻️ refactor mesh loading

src/bin/pumpkin.rs

@@ -121,6 +121,15 @@ fn make_object_space_vec (inverse_model_mat: &Mat4, world_space_vec: &Vec3)
 	Vec3::from ((v4.x (), v4.y (), v4.z ()))
 }
 
+fn renderable_from_iqm_file <P> (filename: P) -> RenderableModel
+where P: AsRef <std::path::Path>
+{
+	let data = load_small_file (filename, 1024 * 1024);
+	let model = Model::from_slice (&data);
+	
+	RenderableModel::from_iqm (&model)
+}
+
 fn main () {
 	let sdl_context = sdl2::init ().unwrap ();
 	let video_subsystem = sdl_context.video ().unwrap ();
@@ -212,20 +221,11 @@ fn main () {
 	let texture = Texture::from_file ("sky.png");
 	texture.bind ();
 	
-	let model_data = load_small_file ("pumpking.iqm", 1024 * 1024);
-	let model = Model::from_slice (&model_data);
+	let mesh_pumpkin = renderable_from_iqm_file ("pumpking.iqm");
+	let mesh_sky = renderable_from_iqm_file ("sky-sphere.iqm");
+	let mesh_pitch = renderable_from_iqm_file ("pitch.iqm");
 	
-	let renderable_model = RenderableModel::from_iqm (&model);
-	
-	let sky_data = load_small_file ("sky-sphere.iqm", 1024 * 1024);
-	let sky_model = Model::from_slice (&sky_data);
-	
-	let renderable_sky = RenderableModel::from_iqm (&sky_model);
-	
-	let (renderable_pitch, pitch_colors, grass_index) = {
-		let data = load_small_file ("pitch.iqm", 1024 * 1024);
-		let model = Model::from_slice (&data);
-		
+	let (pitch_colors, grass_index) = {
 		let silver = (255.0, 255.0, 255.0);
 		let wood = (133.0, 76.0, 48.0);
 		
@@ -249,8 +249,8 @@ fn main () {
 		].into_iter ());
 		
 		let mut grass_index = None;
-		let colors: Vec <_> = (0..model.meshes.len ()).map (|i| {
-			let name = str::from_utf8 (model.get_mesh_name (i)).unwrap ();
+		let colors: Vec <_> = (0..mesh_pitch.meshes.len ()).map (|i| {
+			let name = str::from_utf8 (&mesh_pitch.meshes [i].name).unwrap ();
 			if name == "Grass" {
 				grass_index = Some (i);
 			}
@@ -261,7 +261,7 @@ fn main () {
 			}
 		}).collect ();
 		
-		(RenderableModel::from_iqm (&model), colors, grass_index.unwrap ())
+		(colors, grass_index.unwrap ())
 	};
 	
 	glezz::enable_vertex_attrib_array (attrs ["pos"]);
@@ -364,20 +364,20 @@ fn main () {
 			
 			{
 				glezz::uniform_3fv (unis [&ALBEDO], &orange);
-				renderable_model.draw (&attrs, 0);
+				mesh_pumpkin.draw (&attrs, 0);
 				
 				glezz::uniform_3fv (unis [&ALBEDO], &green);
-				renderable_model.draw (&attrs, 1);
+				mesh_pumpkin.draw (&attrs, 1);
 			}
 			
 			let mvp = view_mat * world_model_mat;
 			glezz::uniform_matrix_4fv (unis [&MVP], &mvp);
 			
-			for (i, color) in pitch_colors.iter ().enumerate ().take (renderable_pitch.num_meshes ())
+			for (i, color) in pitch_colors.iter ().enumerate ().take (mesh_pitch.num_meshes ())
 			{
 				glezz::uniform_3fv (unis [&ALBEDO], color);
 				if i != grass_index {
-					renderable_pitch.draw (&attrs, i);
+					mesh_pitch.draw (&attrs, i);
 				}
 			}
 			
@@ -390,7 +390,7 @@ fn main () {
 				glezz::uniform_3fv (unis [&MIN_ALBEDO], &black);
 				glezz::uniform_1i (unis [&TEXTURE], 0);
 				
-				renderable_sky.draw (&attrs, 0);
+				mesh_sky.draw (&attrs, 0);
 			}
 			
 			glezz::enable (gl::STENCIL_TEST);
@@ -410,16 +410,16 @@ fn main () {
 			glezz::uniform_matrix_4fv (shadow_unis [&MVP], &mvp);
 			
 			{
-				renderable_model.draw (&shadow_attrs, 0);
-				renderable_model.draw (&shadow_attrs, 1);
+				mesh_pumpkin.draw (&shadow_attrs, 0);
+				mesh_pumpkin.draw (&shadow_attrs, 1);
 			}
 			
 			let mvp = view_mat * world_model_mat;
 			glezz::uniform_matrix_4fv (shadow_unis [&MVP], &mvp);
 			
-			for i in 0..renderable_pitch.num_meshes () {
+			for i in 0..mesh_pitch.num_meshes () {
 				if i != grass_index {
-					renderable_pitch.draw (&shadow_attrs, i);
+					mesh_pitch.draw (&shadow_attrs, i);
 				}
 			}
 			
@@ -450,14 +450,14 @@ fn main () {
 				gl::StencilOp (gl::KEEP, gl::KEEP, gl::KEEP);
 			}
 			glezz::uniform_3fv (unis [&OBJECT_SPACE_LIGHT], &Vec3::from ((0.0, 0.0, 0.0)));
-			renderable_pitch.draw (&attrs, grass_index);
+			mesh_pitch.draw (&attrs, grass_index);
 			
 			unsafe {
 				gl::StencilFunc (gl::EQUAL, 0, 1);
 				gl::StencilOp (gl::KEEP, gl::KEEP, gl::KEEP);
 			}
 			glezz::uniform_3fv (unis [&OBJECT_SPACE_LIGHT], &object_space_light);
-			renderable_pitch.draw (&attrs, grass_index);
+			mesh_pitch.draw (&attrs, grass_index);
 		}
 		
 		window.gl_swap_window ();

src/renderable_model.rs

@@ -11,9 +11,10 @@ use crate::iqm;
 // from the IQM model. IQM is zero-copy, but this is not.
 // Since it's opaque, I can drop in a VBO/IBO setup when I'm not lazy.
 
-struct RenderableMesh {
+pub struct RenderableMesh {
 	first_triangle: usize,
 	num_triangles: i32,
+	pub name: Vec <u8>,
 }
 
 pub struct RenderableModel {
@@ -24,7 +25,7 @@ pub struct RenderableModel {
 	vertexes: VertexBuffer,
 	indexes: IndexBuffer,
 	
-	meshes: Vec <RenderableMesh>,
+	pub meshes: Vec <RenderableMesh>,
 }
 
 unsafe fn vertex_attrib_pointer (id: Option <u32>, num_coords: i32, float_offset: usize) {
@@ -37,8 +38,6 @@ unsafe fn vertex_attrib_pointer (id: Option <u32>, num_coords: i32, float_offset
 }
 
 impl RenderableModel {
-	//pub fn from_
-	
 	pub fn from_iqm (model: &iqm::Model) -> RenderableModel {
 		let pos_bytes = model.get_vertex_slice (iqm::types::POSITION);
 		let uv_bytes = model.get_vertex_slice (iqm::types::TEXCOORD);
@@ -69,10 +68,11 @@ impl RenderableModel {
 		assert! (max_index * 2 < num_uv);
 		assert! (max_index * 3 < num_normal);
 		
-		let meshes = model.meshes.iter ()
-		.map (|mesh| RenderableMesh {
+		let meshes = model.meshes.iter ().enumerate ()
+		.map (|(i, mesh)| RenderableMesh {
 			first_triangle: mesh.first_triangle.try_into ().unwrap (),
 			num_triangles: mesh.num_triangles.try_into ().unwrap (),
+			name: model.get_mesh_name (i).to_owned (),
 		})
 		.collect ();