mirror of https://github.com/Leinnan/doppler.git
133 lines
4.2 KiB
Rust
133 lines
4.2 KiB
Rust
#![allow(non_snake_case)]
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#![allow(dead_code)]
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use std::os::raw::c_void;
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use std::path::Path;
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use cgmath::{vec2, vec3};
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use gl;
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use image;
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use image::DynamicImage::*;
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use image::GenericImage;
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use tobj;
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use crate::gaia::mesh::{Mesh, Texture, Vertex};
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use crate::gaia::shader::Shader;
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use crate::gaia::utils::*;
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// #[derive(Default)]
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pub struct Model {
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/* Model Data */
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pub meshes: Vec<Mesh>,
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pub textures_loaded: Vec<Texture>, // stores all the textures loaded so far, optimization to make sure textures aren't loaded more than once.
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directory: String,
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}
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impl Model {
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/// constructor, expects a filepath to a 3D model.
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pub fn new(path: &str) -> Model {
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let pathObj = Path::new(path);
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let mut model = Model {
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meshes: Vec::<Mesh>::new(),
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textures_loaded: Vec::<Texture>::new(),
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directory: pathObj
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.parent()
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.unwrap_or_else(|| Path::new(""))
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.to_str()
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.unwrap()
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.into(),
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};
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model.loadModel(path);
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model
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}
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pub fn Draw(&self, shader: &Shader) {
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for mesh in &self.meshes {
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unsafe {
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mesh.Draw(shader);
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}
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}
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}
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// loads a model from file and stores the resulting meshes in the meshes vector.
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fn loadModel(&mut self, path: &str) {
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let path = Path::new(path);
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println!("Started loading model from path: {}", path.display());
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// retrieve the directory path of the filepath
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self.directory = path
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.parent()
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.unwrap_or_else(|| Path::new(""))
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.to_str()
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.unwrap()
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.into();
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let obj = tobj::load_obj(path, true);
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let (models, materials) = obj.unwrap();
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for model in models {
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let mesh = &model.mesh;
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let num_vertices = mesh.positions.len() / 3;
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// data to fill
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let mut vertices: Vec<Vertex> = Vec::with_capacity(num_vertices);
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let indices: Vec<u32> = mesh.indices.clone();
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let (p, n, t) = (&mesh.positions, &mesh.normals, &mesh.texcoords);
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for i in 0..num_vertices {
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vertices.push(Vertex {
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position: vec3(p[i * 3], p[i * 3 + 1], p[i * 3 + 2]),
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Normal: vec3(n[i * 3], n[i * 3 + 1], n[i * 3 + 2]),
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TexCoords: vec2(t[i * 2], t[i * 2 + 1]),
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..Vertex::default()
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})
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}
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// process material
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let mut textures = Vec::new();
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if let Some(material_id) = mesh.material_id {
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let material = &materials[material_id];
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// 1. diffuse map
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if !material.diffuse_texture.is_empty() {
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let texture =
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self.loadMaterialTexture(&material.diffuse_texture, "texture_diffuse");
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textures.push(texture);
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}
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// 2. specular map
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if !material.specular_texture.is_empty() {
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let texture =
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self.loadMaterialTexture(&material.specular_texture, "texture_specular");
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textures.push(texture);
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}
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// 3. normal map
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if !material.normal_texture.is_empty() {
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let texture =
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self.loadMaterialTexture(&material.normal_texture, "texture_normal");
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textures.push(texture);
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}
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// NOTE: no height maps
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}
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self.meshes.push(Mesh::new(vertices, indices, textures));
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}
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println!("Finished loading model from path: {}", path.display());
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}
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fn loadMaterialTexture(&mut self, path: &str, typeName: &str) -> Texture {
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{
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let texture = self.textures_loaded.iter().find(|t| t.path == path);
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if let Some(texture) = texture {
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return texture.clone();
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}
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}
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let texture = Texture {
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id: unsafe { load_texture_from_dir(path, &self.directory) },
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type_: typeName.into(),
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path: path.into(),
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};
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self.textures_loaded.push(texture.clone());
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texture
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}
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}
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