This commit is contained in:
Piotr Siuszko 2020-08-18 17:33:37 +02:00
commit 75182b76e7
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19
Cargo.toml Normal file
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[package]
name = "doppler"
version = "0.1.0"
authors = ["Piotr <siuszko@zoho.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
cgmath = "0.16.1"
gl = "0.10.0"
glfw = "0.23.0"
image = "0.19.0"
# only needed from chapter 3 on
# tobj = "0.1.6"
# num = "0.2.0"
# rand = "0.5.5"
imgui = "0.4.0"
imgui-glium-renderer = "0.4.0"

20
src/consts.rs Normal file
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@ -0,0 +1,20 @@
// settings
pub const SCR_WIDTH: u32 = 1280;
pub const SCR_HEIGHT: u32 = 720;
pub const VERTEX_SHADER_SRC: &str = r#"
#version 330 core
layout (location = 0) in vec3 aPos;
void main() {
gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
}
"#;
pub const FRAGMENT_SHADER_SRC: &str = r#"
#version 330 core
out vec4 FragColor;
void main() {
FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
}
"#;

0
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158
src/main.rs Normal file
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extern crate glfw;
use self::glfw::{Context, Key, Action};
extern crate gl;
use self::gl::types::*;
use std::sync::mpsc::Receiver;
use std::ffi::CString;
use std::ptr;
use std::str;
use std::mem;
use std::os::raw::c_void;
mod consts;
pub fn main() {
// glfw: initialize and configure
// ------------------------------
let mut glfw = glfw::init(glfw::FAIL_ON_ERRORS).unwrap();
glfw.window_hint(glfw::WindowHint::ContextVersion(3, 3));
glfw.window_hint(glfw::WindowHint::OpenGlProfile(glfw::OpenGlProfileHint::Core));
#[cfg(target_os = "macos")]
glfw.window_hint(glfw::WindowHint::OpenGlForwardCompat(true));
// glfw window creation
// --------------------
let (mut window, events) = glfw.create_window(consts::SCR_WIDTH, consts::SCR_HEIGHT, "LearnOpenGL", glfw::WindowMode::Windowed)
.expect("Failed to create GLFW window");
window.make_current();
window.set_key_polling(true);
window.set_framebuffer_size_polling(true);
// gl: load all OpenGL function pointers
// ---------------------------------------
gl::load_with(|symbol| window.get_proc_address(symbol) as *const _);
let (shaderProgram, VAO) = unsafe {
let vertexShader = gl::CreateShader(gl::VERTEX_SHADER);
let c_str_vertex = CString::new(consts::VERTEX_SHADER_SRC.as_bytes()).unwrap();
gl::ShaderSource(vertexShader, 1, &c_str_vertex.as_ptr(), ptr::null());
gl::CompileShader(vertexShader);
// check for shader compile errors
let mut success = gl::FALSE as GLint;
let mut infoLog = Vec::with_capacity(512);
infoLog.set_len(512 - 1); // subtract 1 to skip the trailing null character
gl::GetShaderiv(vertexShader, gl::COMPILE_STATUS, &mut success);
if success != gl::TRUE as GLint {
gl::GetShaderInfoLog(vertexShader, 512, ptr::null_mut(), infoLog.as_mut_ptr() as *mut GLchar);
println!("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n{}", str::from_utf8(&infoLog).unwrap());
}
let fragmentShader = gl::CreateShader(gl::FRAGMENT_SHADER);
let c_str_fragment = CString::new(consts::FRAGMENT_SHADER_SRC.as_bytes()).unwrap();
gl::ShaderSource(fragmentShader,1, &c_str_fragment.as_ptr(), ptr::null());
gl::CompileShader(fragmentShader);
// check for shader compile errors
gl::GetShaderiv(fragmentShader, gl::COMPILE_STATUS, &mut success);
if success != gl::TRUE as GLint {
gl::GetShaderInfoLog(fragmentShader, 512, ptr::null_mut(), infoLog.as_mut_ptr() as *mut GLchar);
println!("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n{}", str::from_utf8(&infoLog).unwrap());
}
let shaderProgram = gl::CreateProgram();
gl::AttachShader(shaderProgram, vertexShader);
gl::AttachShader(shaderProgram, fragmentShader);
gl::LinkProgram(shaderProgram);
// check for linking errors
gl::GetProgramiv(shaderProgram, gl::LINK_STATUS, &mut success);
if success != gl::TRUE as GLint {
gl::GetProgramInfoLog(shaderProgram, 512, ptr::null_mut(), infoLog.as_mut_ptr() as *mut GLchar);
println!("ERROR::SHADER::PROGRAM::COMPILATION_FAILED\n{}", str::from_utf8(&infoLog).unwrap());
}
gl::DeleteShader(vertexShader);
gl::DeleteShader(fragmentShader);
// set up vertex data (and buffer(s)) and configure vertex attributes
// ------------------------------------------------------------------
// HINT: type annotation is crucial since default for float literals is f64
let vertices: [f32; 9] = [
-0.5, -0.5, 0.0, // left
0.5, -0.5, 0.0, // right
0.0, 0.5, 0.0 // top
];
let (mut VBO, mut VAO) = (0, 0);
gl::GenVertexArrays(1, &mut VAO);
gl::GenBuffers(1, &mut VBO);
gl::BindVertexArray(VAO);
gl::BindBuffer(gl::ARRAY_BUFFER, VBO);
gl::BufferData(gl::ARRAY_BUFFER,
(vertices.len() * mem::size_of::<GLfloat>()) as GLsizeiptr,
&vertices[0] as *const f32 as *const c_void,
gl::STATIC_DRAW);
gl::VertexAttribPointer(0,3,gl::FLOAT, gl::FALSE, 3 * mem::size_of::<GLfloat>() as GLsizei, ptr::null());
gl::EnableVertexAttribArray(0);
gl::BindBuffer(gl::ARRAY_BUFFER, 0);
// uncomment this call to draw in wireframe polygons.
// gl::PolygonMode(gl::FRONT_AND_BACK, gl::LINE);
(shaderProgram, VAO)
};
// render loop
// -----------
let mut color_r = 0.0;
let mut color_g = 0.0;
let mut color_b = 0.0;
while !window.should_close() {
// events
// -----
process_events(&mut window, &events);
color_r = (color_r + 0.03) % 1.0;
color_g = (color_g + 0.01) % 0.6;
color_b = (color_b + 0.02) % 1.0;
// render
// ------
unsafe {
gl::ClearColor(color_r, color_g, color_b, 1.0);
gl::Clear(gl::COLOR_BUFFER_BIT);
// draw our first triangle
gl::UseProgram(shaderProgram);
gl::BindVertexArray(VAO); // seeing as we only have a single VAO there's no need to bind it every time, but we'll do so to keep things a bit more organized
gl::DrawArrays(gl::TRIANGLES, 0, 3);
}
// glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
// -------------------------------------------------------------------------------
window.swap_buffers();
glfw.poll_events();
}
}
// NOTE: not the same version as in common.rs!
fn process_events(window: &mut glfw::Window, events: &Receiver<(f64, glfw::WindowEvent)>) {
for (_, event) in glfw::flush_messages(events) {
match event {
glfw::WindowEvent::FramebufferSize(width, height) => {
// make sure the viewport matches the new window dimensions; note that width and
// height will be significantly larger than specified on retina displays.
unsafe { gl::Viewport(0, 0, width, height) }
}
glfw::WindowEvent::Key(Key::Escape, _, Action::Press, _) => window.set_should_close(true),
glfw::WindowEvent::Key(_, _, Action::Press, _) => println!("Other key pressed"),
_ => {}
}
}
}