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#[macro_use]
extern crate glium;
extern crate image;
mod util;
mod cow_face;
mod cow_hide;
fn run() {
use glium::{DisplayBuild, Surface};
let mut t: f32 = 0.0;
let mut x: f32;
let display = glium::glutin::WindowBuilder::new()
.with_title(format!("Exuberant Cow!"))
.with_depth_buffer(24)
.build_glium()
.unwrap();
let indices = glium::index::NoIndices(glium::index::PrimitiveType::TrianglesList);
let vertices = glium::VertexBuffer::new(
&display, &cow_hide::cow_hide_vertices).unwrap();
let vertex_shader_src = r#"
#version 140
uniform mat4 perspective;
uniform mat4 view;
uniform mat4 model;
in vec3 position;
in vec3 normal;
out vec3 v_normal;
out vec3 v_position;
void main() {
mat4 modelview = view * model;
v_normal = transpose(inverse(mat3(modelview))) * normal;
gl_Position = perspective * modelview * vec4(position, 1.0);
v_position = gl_Position.xyz / gl_Position.w;
}
"#;
let fragment_shader_src = r#"
#version 140
uniform vec3 u_light;
in vec3 v_normal;
in vec3 v_position;
out vec4 color;
const vec3 ambient_color = vec3(0.2, 0.0, 0.0);
const vec3 diffuse_color = vec3(0.6, 0.0, 0.0);
const vec3 specular_color = vec3(1.0, 1.0, 1.0);
void main() {
float diffuse = max(dot(normalize(v_normal), normalize(u_light)), 0.0);
vec3 camera_dir = normalize(-v_position);
vec3 half_direction = normalize(normalize(u_light) + camera_dir);
float specular = pow(max(dot(half_direction, normalize(v_normal)), 0.0), 16.);
color = vec4(ambient_color +
diffuse * diffuse_color +
specular * specular_color, 1.0);
}
"#;
let program = glium::Program::from_source(
&display,
vertex_shader_src,
fragment_shader_src,
None).unwrap();
loop {
t += 0.02;
x = 0.5 * t.sin();
// Drawing Pipeline
let mut target = display.draw();
let (width, height) = target.get_dimensions();
let aspect_ratio = height as f32 / width as f32;
// Calculate Perspective Matrix
let fov: f32 = 3.141592 / 3.0; // 120 deg
let zfar = 1024.0;
let znear = 0.1;
let f = 1.0 / (fov / 2.0).tan();
let perspective = [
[f * aspect_ratio , 0.0, 0.0 , 0.0],
[ 0.0 , f , 0.0 , 0.0],
[ 0.0 , 0.0, (zfar+znear)/(zfar-znear) , 1.0],
[ 0.0 , 0.0, -(2.0*zfar*znear)/(zfar-znear), 0.0],
];
let light = [-1.0, 0.4, 0.9f32];
let view = util::view_matrix(&[2.0, -1.0, 1.0], &[-2.0, 1.0, 1.0], &[0.0, 1.0, 0.0]);
let uniforms = uniform! {
model: [
[ 0.3, 0.0, 0.0, 0.0 ],
[ 0.0, 0.3, 0.0, 0.0 ],
[ 0.0, 0.0, 0.3, 0.0 ],
[ x, 0.0, 2.0, 1.0 ]],
u_light: light,
perspective: perspective,
view: view,
};
target.clear_color_and_depth((0.2, 0.2, 0.2, 1.0), 1.0);
let params = glium::DrawParameters {
depth: glium::Depth {
test: glium::draw_parameters::DepthTest::IfLess,
write: true,
.. Default::default()
},
// NB: would enable if all models were "closed" ("sealed", no gaps)
backface_culling: glium::draw_parameters::BackfaceCullingMode::CullClockwise,
.. Default::default()
};
target.draw(&vertices,
&indices,
&program,
&uniforms,
¶ms).unwrap();
target.finish().unwrap();
for ev in display.poll_events() {
match ev {
glium::glutin::Event::Closed => return,
_ => ()
}
}
// XXX: sleep here for 10ms
}
}
fn main() {
run();
}
|
