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/**********************************************************************
*
* .obj loader
*
* Copyright (c) 2021 Dario Deledda. All rights reserved.
* Use of this source code is governed by an MIT license
* that can be found in the LICENSE file.
*
* TODO:
**********************************************************************/
module obj
import gg.m4
// part struct mantain the fae indexes list
pub struct Part {
pub mut:
faces [][][3]int // v n t index order, if -1 not available
name string
material string
}
// materias struct, all Ks and Ns are stored as maps of string
pub struct Material {
pub mut:
name string
ks map[string]m4.Vec4
ns map[string]f32
maps map[string]string
}
// render data used for the rendering
pub struct Render_data {
pub mut:
pipeline C.sg_pipeline
bind C.sg_bindings
n_vert u32
material string
}
// base object parts struct
pub struct ObjPart {
pub mut:
v []m4.Vec4 // position
vn []m4.Vec4 // normals
vp []m4.Vec4 // vertex params
vt []m4.Vec4 // textures
name string
part []Part // parts of the ObjPart
mat []Material // list of the materials of the ObjPart
mat_map map[string]int // maping material name to its material index
texture map[string]C.sg_image // GPU loaded texture map
material_file string // .mtl file name for the .obj
rend_data []Render_data // render data used for the rendering
t_m m4.Mat4 = m4.unit_m4() // transform matrix for this ObjPart
// child []ObjPart // childs
// stats
min m4.Vec4 // min 3d position in the ObjPart
max m4.Vec4 // max 3d position in the ObjPart
radius f32 // bounding circle radius of the ObjPart
}
// used in to pass the matrices to the shader
pub struct Mats {
pub mut:
mv m4.Mat4
mvp m4.Mat4
nm m4.Mat4
}
// data passed to the vertex shader
pub struct Tmp_vs_param {
pub mut:
mv m4.Mat4
mvp m4.Mat4
nm m4.Mat4
}
// data passed to the pixel shader
pub struct Tmp_fs_param {
pub mut:
ligth m4.Vec4
ka m4.Vec4 = m4.Vec4{
e: [f32(0.1), 0.0, 0.0, 1.0]!
}
kd m4.Vec4 = m4.Vec4{
e: [f32(0.5), 0.5, 0.5, 1.0]!
}
ks m4.Vec4 = m4.Vec4{
e: [f32(1.0), 1.0, 1.0, 1.0]!
}
}
// shader data for the rendering
pub struct Shader_data {
pub mut:
vs_data &Tmp_vs_param
vs_len int
fs_data &Tmp_fs_param
fs_len int
}
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