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-rw-r--r--Cargo.lock42
-rw-r--r--Cargo.toml1
-rw-r--r--src/main.rs123
3 files changed, 138 insertions, 28 deletions
diff --git a/Cargo.lock b/Cargo.lock
index 86f5dd3..36386d9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,6 +4,7 @@
name = "bezier"
version = "0.1.0"
dependencies = [
+ "gl",
"sdl2",
]
@@ -20,6 +21,32 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
[[package]]
+name = "gl"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a94edab108827d67608095e269cf862e60d920f144a5026d3dbcfd8b877fb404"
+dependencies = [
+ "gl_generator",
+]
+
+[[package]]
+name = "gl_generator"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a95dfc23a2b4a9a2f5ab41d194f8bfda3cabec42af4e39f08c339eb2a0c124d"
+dependencies = [
+ "khronos_api",
+ "log",
+ "xml-rs",
+]
+
+[[package]]
+name = "khronos_api"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
+
+[[package]]
name = "lazy_static"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -32,6 +59,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "89203f3fba0a3795506acaad8ebce3c80c0af93f994d5a1d7a0b1eeb23271929"
[[package]]
+name = "log"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcf3805d4480bb5b86070dcfeb9e2cb2ebc148adb753c5cca5f884d1d65a42b2"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
name = "sdl2"
version = "0.34.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -59,3 +95,9 @@ name = "version-compare"
version = "0.0.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d63556a25bae6ea31b52e640d7c41d1ab27faba4ccb600013837a3d0b3994ca1"
+
+[[package]]
+name = "xml-rs"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b07db065a5cf61a7e4ba64f29e67db906fb1787316516c4e6e5ff0fea1efcd8a"
diff --git a/Cargo.toml b/Cargo.toml
index 6eed337..4c68533 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,4 @@ edition = "2018"
[dependencies]
sdl2 = "0.34.3"
+gl = "0.14.0"
diff --git a/src/main.rs b/src/main.rs
index 7424f7a..aa149e3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,12 +7,32 @@ use number::Number;
use std::thread;
use std::time::Duration;
+use std::os::raw::c_void;
+use std::ffi::{CString, CStr};
use sdl2::event::Event;
use sdl2::keyboard::Keycode;
use sdl2::pixels::Color;
use sdl2::rect::Rect;
+use gl::types::*;
+
+fn shader_from_source(source: &CStr, shader_type: GLenum) -> GLuint {
+ unsafe {
+ let shader: GLuint = gl::CreateShader(shader_type);
+ gl::ShaderSource(shader, 1, &source.as_ptr(), std::ptr::null());
+ gl::CompileShader(shader);
+ let mut success: gl::types::GLint = 1;
+ unsafe {
+ gl::GetShaderiv(shader, gl::COMPILE_STATUS, &mut success);
+ }
+ if success == 0 {
+ println!("Compilation error: {}", source.to_str().unwrap());
+ }
+ shader
+ }
+}
+
fn main() {
let a = Lerp::new(vec![2.0, -2.0, 2.0]);
let b = Lerp::new(vec![-1.0, 1.0, 2.0]);
@@ -23,18 +43,84 @@ fn main() {
let sdl_context = sdl2::init().unwrap();
let video_subsystem = sdl_context.video().unwrap();
+ let gl_attr = video_subsystem.gl_attr();
+
+ gl_attr.set_context_profile(sdl2::video::GLProfile::Core);
+ gl_attr.set_context_version(4, 1);
+
+ let window_w: u32 = 800;
+ let window_h: u32 = 600;
+
let window = video_subsystem
- .window("rust-sdl2 demo", 800, 600)
+ .window("bezier", window_w, window_h)
.position_centered()
+ .opengl()
.build()
.unwrap();
- let mut canvas = window.into_canvas().build().unwrap();
+ let gl_context = window.gl_create_context().unwrap();
+
+ gl::load_with(|s| video_subsystem.gl_get_proc_address(s) as *const std::os::raw::c_void);
+
+ unsafe {
+ gl::Viewport(0, 0, window_w as i32, window_h as i32);
+ }
+
+ let vertices: [f32; 18] = [
+ // first triangle
+ 1.0, 1.0, 0.0,
+ 1.0, -1.0, 0.0,
+ -1.0, 1.0, 0.0,
+ // // second triangle
+ 1.0, -1.0, 0.0,
+ -1.0, -1.0, 0.0,
+ -1.0, 1.0, 0.0
+ ];
+
+ let vertex_shader_source = b"
+ #version 410 core
+ layout (location = 0) in vec3 aPos;
+
+ void main() {
+ gl_Position = vec4(aPos.xyz, 1.0);
+ }
+ ".to_vec();
+
+ let fragment_shader_source = b"
+ #version 410 core
+ out vec4 FragColor;
+
+ void main() {
+ FragColor = vec4(0.4, 0.8, 0.2, 1.0);
+ }
+ ".to_vec();
+
+ let mut vbo: GLuint = 0;
+ let mut vao: GLuint = 0;
+ unsafe {
+ gl::GenVertexArrays(1, &mut vao);
+ gl::BindVertexArray(vao);
+ gl::GenBuffers(1, &mut vbo);
+ gl::BindBuffer(gl::ARRAY_BUFFER, vbo);
+ gl::BufferData(gl::ARRAY_BUFFER, (vertices.len() * std::mem::size_of::<f32>()) as GLsizeiptr, vertices.as_ptr() as *const GLvoid, gl::STATIC_DRAW);
+ gl::VertexAttribPointer(0, 3, gl::FLOAT, gl::FALSE, (3 * std::mem::size_of::<f32>()) as GLint, std::ptr::null());
+ gl::EnableVertexAttribArray(0);
+ }
+
+ let mut shader_program: GLuint = 0;
+ unsafe {
+ let vertex_shader = shader_from_source(&CString::from_vec_unchecked(vertex_shader_source), gl::VERTEX_SHADER);
+ let fragment_shader = shader_from_source(&CString::from_vec_unchecked(fragment_shader_source), gl::FRAGMENT_SHADER);
+ shader_program = gl::CreateProgram();
+ gl::AttachShader(shader_program, vertex_shader);
+ gl::AttachShader(shader_program, fragment_shader);
+ gl::LinkProgram(shader_program);
+ gl::DeleteShader(vertex_shader);
+ gl::DeleteShader(fragment_shader);
+ }
let mut event_pump = sdl_context.event_pump().unwrap();
'running: loop {
- canvas.set_draw_color(Color::RGB(20, 20, 20));
- canvas.clear();
for event in event_pump.poll_iter() {
match event {
Event::Quit { .. }
@@ -46,31 +132,12 @@ fn main() {
}
}
- let s = -600.0 / 10.0;
- let k = 600.0 / 2.0;
- for t in -800..800 {
- let x = k + s * pa.eval(t as Number / 100.0);
- let y = k + s * pb.eval(t as Number / 100.0);
- let z = k + s * p.eval(t as Number / 100.0);
- canvas.set_draw_color(Color::RGB(180, 20, 20));
- canvas
- .fill_rect(Rect::new(400 + t, x as i32, 5, 5))
- .unwrap();
- canvas.set_draw_color(Color::RGB(20, 180, 20));
- canvas
- .fill_rect(Rect::new(400 + t, y as i32, 5, 5))
- .unwrap();
- canvas.set_draw_color(Color::RGB(20, 20, 180));
- canvas
- .fill_rect(Rect::new(400 + t, z as i32, 2, 2))
- .unwrap();
- canvas.set_draw_color(Color::RGB(255, 0, 0));
- canvas
- .fill_rect(Rect::new(400 + t, k as i32, 2, 2))
- .unwrap();
+ unsafe {
+ gl::Clear(gl::COLOR_BUFFER_BIT);
+ gl::UseProgram(shader_program);
+ gl::DrawArrays(gl::TRIANGLES, 0, 6);
}
- canvas.present();
- thread::sleep(Duration::new(0, 1_000_000_000u32 / 60));
+ window.gl_swap_window();
}
}