kart_apple_gl/
lib.rs

1pub mod core;
2pub mod util;
3
4pub extern crate cgmath;
5pub extern crate gl;
6pub extern crate glfw;
7
8#[cfg(test)]
9mod test {
10
11    use crate::cgmath::{PerspectiveFov, Rad};
12    use crate::core::application::*;
13    use crate::core::attribute::Attribute;
14    use crate::core::camera::Camera;
15    use crate::core::gl_var_type::GLvartype;
16    use crate::core::scaffold::AppScaffold;
17    use crate::util::program_utils::ProgramUtils;
18    use crate::{gl, glfw};
19    use gl::types::GLuint;
20    use glfw::{Action, Key, Modifiers, MouseButton, Scancode};
21    use std::f32::consts::PI;
22
23    #[test]
24    fn three_d_spinning_cube() {
25        unsafe {
26            KartApple::start(PrismGL::new(), 700, 500, "window");
27        }
28    }
29
30    pub struct PrismGL {
31        cam: Option<Camera>,
32        degrees: f32,
33        vao: GLuint,
34        program: GLuint
35    }
36    impl PrismGL {
37        pub fn new() -> PrismGL {
38            PrismGL {
39                cam: None,
40                degrees: 0f32,
41                vao: GLuint::from(1u32),
42                program: GLuint::from(1u32)
43            }
44        }
45    }
46    impl AppScaffold for PrismGL {
47        unsafe fn on_init(&mut self, app: &mut KartApple) {
48            gl::Enable(gl::DEPTH_TEST);
49
50            let vert_code = include_str!("../shaders/vert.glsl").to_string();
51            let frag_code = include_str!("../shaders/frag.glsl").to_string();
52
53            self.program = ProgramUtils::create_program(&vert_code, &frag_code);
54
55            let mut vao = GLuint::from(1u32);
56            gl::GenVertexArrays(1, &mut vao);
57            gl::BindVertexArray(vao);
58            self.vao = vao;
59            let side_length = 0.75f32;
60
61            let vertices = [
62                // side 1
63                -side_length,
64                -side_length,
65                -side_length,
66                side_length,
67                -side_length,
68                -side_length,
69                side_length,
70                side_length,
71                -side_length,
72                -side_length,
73                side_length,
74                -side_length,
75                // side 2
76                -side_length,
77                side_length,
78                side_length,
79                -side_length,
80                -side_length,
81                side_length,
82                -side_length,
83                -side_length,
84                -side_length,
85                -side_length,
86                side_length,
87                -side_length,
88                // side 3
89                -side_length,
90                side_length,
91                -side_length,
92                -side_length,
93                side_length,
94                side_length,
95                side_length,
96                side_length,
97                side_length,
98                side_length,
99                side_length,
100                -side_length,
101                // side 4
102                side_length,
103                -side_length,
104                -side_length,
105                side_length,
106                -side_length,
107                side_length,
108                side_length,
109                side_length,
110                side_length,
111                side_length,
112                side_length,
113                -side_length,
114                // side 5
115                -side_length,
116                side_length,
117                side_length,
118                -side_length,
119                -side_length,
120                side_length,
121                side_length,
122                -side_length,
123                side_length,
124                side_length,
125                side_length,
126                side_length,
127                // side 6
128                -side_length,
129                -side_length,
130                -side_length,
131                side_length,
132                -side_length,
133                -side_length,
134                side_length,
135                -side_length,
136                side_length,
137                -side_length,
138                -side_length,
139                side_length,
140            ];
141
142            Attribute::init(&vertices);
143            Attribute::locate_attribute(self.program, "pos", GLvartype::Vec3);
144
145            let vert_colors = [
146                // side 1
147                0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, // side 2
148                1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, // side 3
149                1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, // side 4
150                1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, // side 5
151                0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, // side 6
152                1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
153            ];
154
155            Attribute::init(&vert_colors);
156            Attribute::locate_attribute(self.program, "vertColor", GLvartype::Vec3);
157
158            let mut cam = Camera::new(self.program, "model", "view", "proj");
159
160            let fov = 90f32;
161            cam.projection(PerspectiveFov {
162                fovy: Rad((PI / 180f32) * fov),
163                aspect: (app.window.width as f32 / app.window.height as f32),
164                near: (0.1f32),
165                far: (100f32),
166            });
167            cam.translate_view_z(-2.50f32);
168            cam.rotate_view_x(40.0);
169            self.cam = Some(cam);
170            self.degrees = 60f32;
171        }
172
173        unsafe fn on_loop(&mut self, app: &mut KartApple) {
174            gl::ClearColor(0.0, 0.0, 0.0, 1.0);
175            gl::Clear(gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT);
176            gl::UseProgram(self.program);
177            self.cam
178                .as_mut()
179                .unwrap()
180                .rotate_model_y(app.delta.value as f32 * self.degrees / 1000000f32);
181            self.cam.as_mut().unwrap().update();
182
183            gl::DrawArrays(gl::QUADS, 0, 24);
184        }
185
186        unsafe fn on_key(&mut self, key: Key, scancode: Scancode, action: Action, modifiers: Modifiers, app: &mut KartApple) {
187            println!("key: {key:?}");
188
189            match key {
190                Key::W => {
191                    self.degrees += 1.0;
192                }
193                _ => {}
194            }
195        }
196
197        unsafe fn on_mouse(&mut self, button: MouseButton, action: Action, modifiers: Modifiers, app: &mut KartApple) {
198        }
199
200        unsafe fn on_resize(&mut self, width: i32, height: i32, app: &mut KartApple) {
201            gl::Viewport(0, 0, width, height);
202        }
203
204        unsafe fn on_clean(&mut self, app: &mut KartApple) {
205            gl::DeleteVertexArrays(1, &self.vao);
206            gl::DeleteBuffers(1, &self.vao);
207            gl::DeleteProgram(self.program);
208
209        }
210    }
211}
kart_apple_gl/lib.rs

kart_apple_gl/
lib.rs
