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#![feature(step_by)]
extern crate orbclient;
extern crate nalgebra as na;
use orbclient::EventIter;
use orbclient::Renderer;
use orbclient::color::Color;
use na::{ Vector3, Vector2, Point2 };
pub struct RenderContext {
window: Box<orbclient::Window>,
zbuffer: Vec<f32>,
}
impl RenderContext {
pub fn new(width: u32, height: u32, title: &str) -> RenderContext {
let orb_window = Box::new(orbclient::Window::new_flags(100, 100, width, height, title, true).unwrap());
RenderContext{window: orb_window, zbuffer: vec![std::f32::MAX; (width * height) as usize] }
}
pub fn draw_pixel(&mut self, x: i32, y: i32, color: Color) {
self.window.pixel(x, y, color);
}
pub fn data_mut(&mut self) -> &mut [Color] {
self.window.data_mut()
}
pub fn edge_function_i(a: Vector3<i32>, b: Vector3<i32>, c: Vector2<i32>) -> bool {
let m = (c.x - a.x) * (b.y - a.y) - (c.y - a.y) * (b.x - a.x);
m < 0_i32
}
pub fn edge_function(a: Point2<f32>, b: Point2<f32>, c: Point2<f32>) -> bool {
let m = (c.x - a.x) * (b.y - a.y) - (c.y - a.y) * (b.x - a.x);
m < 0_f32
}
pub fn get_raw(&mut self) -> &mut [Color] {
self.window.data_mut()
}
pub fn clear(&mut self) {
let color = Color::rgba(10, 30, 30, 255);
let ww = self.window.width();
let wh = self.window.height();
self.window.rect(0, 0, ww, wh, color)
}
// pub fn draw_triangle3(&mut self, top: Vector3<f32>, left: Vector3<f32>, right: Vector3<f32>) {
//
// //vertices in screen space
// let ww_f = self.window.width() as f32;
// let wh_f = self.window.height() as f32;
// let screen_top = Vector3::new((ww_f * top.x as f32) as i32, (wh_f * top.y as f32) as i32, 1);
// let screen_left = Vector3::new((ww_f * left.x as f32) as i32, (wh_f * left.y as f32) as i32, 1);
// let screen_right = Vector3::new((ww_f * right.x as f32) as i32, (wh_f * right.y as f32) as i32, 1);
//
// //bounding box of triangle
// let top_bound = (screen_top.y) as i32;
// let bottom_bound = (std::cmp::max(screen_left.y, screen_right.y)) as i32;
// let mut left_bound = (screen_left.x) as i32;
// let right_bound = (screen_right.x) as i32;
//
// //sample points top left, top right, bottom left, bottom right
// let step = 4;
// let mut tl = Vector2::new(0, 0);
// let mut tr = Vector2::new(0, 0);
// let mut bl = Vector2::new(0, 0);
// let mut br = Vector2::new(0, 0);
//
// let data = self.data_mut();
//
// for y in (top_bound..bottom_bound).step_by(step) {
//
// tl.y = y;
// tr.y = y;
// bl.y = y + step;
// br.y = y + step;
//
// let mut drawn = false;
//
// for x in (left_bound..right_bound).step_by(step) {
//
// tl.x = x;
// tr.x = x + step;
// bl.x = x;
// br.x = x + step;
//
// //check if all 4 points are inside
// let mut tl_inside = true;
// tl_inside &= RenderContext::edge_function_i(screen_left, screen_top, tl);
// tl_inside &= RenderContext::edge_function_i(screen_top, screen_right, tl);
// tl_inside &= RenderContext::edge_function_i(screen_right, screen_left, tl);
//
// let mut tr_inside = true;
// tr_inside &= RenderContext::edge_function_i(screen_left, screen_top, tr);
// tr_inside &= RenderContext::edge_function_i(screen_top, screen_right, tr);
// tr_inside &= RenderContext::edge_function_i(screen_right, screen_left, tr);
//
// let mut bl_inside = true;
// bl_inside &= RenderContext::edge_function_i(screen_left, screen_top, bl);
// bl_inside &= RenderContext::edge_function_i(screen_top, screen_right, bl);
// bl_inside &= RenderContext::edge_function_i(screen_right, screen_left, bl);
//
// let mut br_inside = true;
// br_inside &= RenderContext::edge_function_i(screen_left, screen_top, br);
// br_inside &= RenderContext::edge_function_i(screen_top, screen_right, br);
// br_inside &= RenderContext::edge_function_i(screen_right, screen_left, br);
//
// let inside = tl_inside && tr_inside && bl_inside && br_inside;
// let edge = tl_inside || tr_inside || bl_inside || br_inside;
//
// //fill entire square
// if inside {
//
// //do not check before triangle .. skip from left
//// if !drawn {
//// left_bound = x / 2;
//// }
//
// let color = Color::rgba((x / 6) as u8, (y / 6) as u8, 100, 255);
// for sy in y..y+step as i32 {
// for sx in x..x+step as i32 {
// let new = color.data;
// let old = &mut data[sy as usize * ww_f as usize + sx as usize].data;
// *old = new;
//// self.draw_pixel(sx, sy, Color::rgba((x / 6) as u8, (y / 6) as u8, 100, 255));
//
// }
// }
//
// // self.window.rect(x, y, step as u32, step as u32, Color::rgba(100, 100, 250, 255));
// drawn = true
//
// } else if edge {
// for sy in y..y+step as i32 {
// for sx in x..x+step as i32 {
// let p = Vector2::new(sx, sy);
//
// let mut p_inside = true;
// p_inside &= RenderContext::edge_function_i(screen_left, screen_top, p);
// p_inside &= RenderContext::edge_function_i(screen_top, screen_right, p);
// p_inside &= RenderContext::edge_function_i(screen_right, screen_left, p);
//
// if p_inside {
// let color = Color::rgba(240, 100, 100, 255);
//// self.draw_pixel(sx, sy, Color::rgba(240, 100, 100, 255));
// let new = color.data;
// let old = &mut data[sy as usize * ww_f as usize + sx as usize].data;
// *old = new;
// }
// }
// }
// } else {
// //fully outside no worries
//// let color = Color::rgba(100, 100, 250, 255);
//// let new = color.data;
//// let old = &mut data[y as usize * ww_f as usize + x as usize].data;
//// *old = new;
//
// //do not check after triangle on the right
// if drawn {
// break;
// }
// }
//
//
// }
// }
//
// }
//
// pub fn draw_triangle2(&mut self, top: Vector3<f32>, left: Vector3<f32>, right: Vector3<f32>) {
//
// let step = 4;
//
// let ww = self.window.width();
// let wh = self.window.height();
//
// //screen space
// let top_bound = (self.window.height() as f32 * top.y) as i32;
// let bottom_bound = (self.window.height() as f32 * f32::max(left.y, right.y)) as i32;
// let left_bound = (self.window.width() as f32 * left.x) as i32;
// let right_bound = (self.window.width() as f32 * right.x) as i32;
//
// //world space
// let mut tl = Vector2::new(left_bound as f32 / self.window.width() as f32, top_bound as f32 / self.window.height() as f32);
// let mut tr = Vector2::new(left_bound as f32 / self.window.width() as f32 + step as f32 / self.window.width() as f32, top_bound as f32 / self.window.height() as f32);
// let mut bl = Vector2::new(left_bound as f32 / self.window.width() as f32, top_bound as f32 / self.window.height() as f32 + step as f32 / self.window.width() as f32);
// let mut br = Vector2::new(left_bound as f32 / self.window.width() as f32 + step as f32 / self.window.width() as f32, top_bound as f32 / self.window.height() as f32+ step as f32 / self.window.width() as f32);
//
// let data = self.data_mut();
//
// for y in (top_bound..bottom_bound).step_by(step) {
//
// tl.y = y as f32 / wh as f32;
// tr.y = y as f32 / wh as f32;
// bl.y = y as f32 / wh as f32 + step as f32 / wh as f32;
// br.y = y as f32 / wh as f32 + step as f32 / wh as f32;
//
//// let mut drawn = false;
//
// for x in (left_bound..right_bound).step_by(step) {
//
// tl.x = x as f32 / ww as f32;
// tr.x = x as f32 / ww as f32 + step as f32 / ww as f32;
// bl.x = x as f32 / ww as f32;
// br.x = x as f32 / ww as f32 + step as f32 / ww as f32;
//
// //check if all 4 points are inside
// let mut tl_inside = true;
// tl_inside &= RenderContext::edge_function(left, top, tl);
// tl_inside &= RenderContext::edge_function(top, right, tl);
// tl_inside &= RenderContext::edge_function(right, left, tl);
//
// let mut tr_inside = true;
// tr_inside &= RenderContext::edge_function(left, top, tr);
// tr_inside &= RenderContext::edge_function(top, right, tr);
// tr_inside &= RenderContext::edge_function(right, left, tr);
//
// let mut bl_inside = true;
// bl_inside &= RenderContext::edge_function(left, top, bl);
// bl_inside &= RenderContext::edge_function(top, right, bl);
// bl_inside &= RenderContext::edge_function(right, left, bl);
//
// let mut br_inside = true;
// br_inside &= RenderContext::edge_function(left, top, br);
// br_inside &= RenderContext::edge_function(top, right, br);
// br_inside &= RenderContext::edge_function(right, left, br);
//
// let inside = tl_inside && tr_inside && bl_inside && br_inside;
// let edge = tl_inside || tr_inside || bl_inside || br_inside;
//
// //fill entire square
// if inside {
//// let color = Color::rgba(100, 100, 100, 255);
// for sy in y..y+step as i32 {
// for sx in x..x+step as i32 {
//// self.draw_pixel(sx, sy, Color::rgba((x / 6) as u8, (y / 6) as u8, 100, 255));
// let color = Color::rgba((x / 6) as u8, (y / 6) as u8, 100, 255);
// let new = color.data;
// let old = &mut data[sy as usize * ww as usize + sx as usize].data;
// *old = new;
// }
// }
//
//// self.window.rect(x, y, step as u32, step as u32, Color::rgba(100, 100, 250, 255));
//
//// drawn = true
// } else if edge {
// for sy in y..y+step as i32 {
// for sx in x..x+step as i32 {
// let p = Vector2::new(sx as f32 / ww as f32, sy as f32 / wh as f32);
//
// let mut p_inside = true;
// p_inside &= RenderContext::edge_function(left, top, p);
// p_inside &= RenderContext::edge_function(top, right, p);
// p_inside &= RenderContext::edge_function(right, left, p);
//
// if p_inside {
//// self.draw_pixel(sx, sy, Color::rgba(240, 100, 100, 255));
// let color = Color::rgba(240, 100, 100, 255);
// let new = color.data;
// let old = &mut data[sy as usize * ww as usize + sx as usize].data;
// *old = new;
// }
// }
// }
// } else {
// //fully outside no worries
//// self.window.rect(x, y, step as u32, step as u32, Color::rgba(100, 200, 100, 255));
//
//// if drawn {
//// break;
//// }
// }
// }
// }
// }
//assume vertices are in right order and in raster space
pub fn draw_triangle1(&mut self, top: Point2<f32>, left: Point2<f32>, right: Point2<f32>) {
let ww = self.window.width();
let wh = self.window.height();
let ww_f = self.window.width() as f32;
let wh_f = self.window.height() as f32;
// let screen_top = Vector3::new((ww_f * top.x as f32) as i32, (wh_f * top.y as f32) as i32, 1);
// let screen_left = Vector3::new((ww_f * left.x as f32) as i32, (wh_f * left.y as f32) as i32, 1);
// let screen_right = Vector3::new((ww_f * right.x as f32) as i32, (wh_f * right.y as f32) as i32, 1);
let top_bound = (top.y) as i32;
let bottom_bound = (f32::max(left.y, right.y)) as i32;
let mut left_bound = (left.x) as i32;
let right_bound = (right.x) as i32;
// let top_bound = (self.window.height() as f32 * top.y) as i32;
// let bottom_bound = (self.window.height() as f32 * f32::max(left.y, right.y)) as i32;
// let mut left_bound = (self.window.width() as f32 * left.x) as i32;
// let right_bound = (self.window.width() as f32 * right.x) as i32;
//bounding box of triangle
// let top_bound = (screen_top.y) as i32;
// let bottom_bound = (std::cmp::max(screen_left.y, screen_right.y)) as i32;
// let mut left_bound = (screen_left.x) as i32;
// let right_bound = (screen_right.x) as i32;
// let data = self.data_mut();
for y in top_bound..bottom_bound {
for x in left_bound..right_bound {
let p = Point2::new(x as f32 , y as f32);
let mut p_inside = true;
p_inside &= RenderContext::edge_function(left, top, p);
p_inside &= RenderContext::edge_function(top, right, p);
p_inside &= RenderContext::edge_function(right, left, p);
// let p = Vector2::new(x, y);
// let mut p_inside = true;
// p_inside &= RenderContext::edge_function_i(screen_left, screen_top, p);
// p_inside &= RenderContext::edge_function_i(screen_top, screen_right, p);
// p_inside &= RenderContext::edge_function_i(screen_right, screen_left, p);
if p_inside {
self.draw_pixel(x, y, Color::rgba(200, 50, 50, 255));
// let color = Color::rgba((x / 6) as u8, (y / 6) as u8, 100, 255);
// let new = color.data;
// let old = &mut data[y as usize * ww as usize + x as usize].data;
// *old = new;
} else {
// do not check after triangle
// if drawn {
// continue;
// }
// self.draw_pixel(x, y, Color::rgba(200, 50, 50, 255));
}
}
}
}
// pub fn draw_triangleX(&mut self, _: Vector3<f32>, _: Vector3<f32>, _: Vector3<f32>) {
//
// let color = Color::rgba(200, 150, 100, 255);
// let ww = self.window.width();
// let wh = self.window.height();
// let data = self.data_mut();
//
// for y in 0..wh {
// for x in 0..ww {
// let new = color.data;
// let old = &mut data[y as usize * ww as usize + x as usize].data;
// *old = new;
// }
// }
//
//// self.window.rect(0,0,ww, wh, color);
// }
pub fn sync(&mut self) {
self.window.sync();
}
pub fn events(&mut self) -> EventIter {
self.window.events()
}
}
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
}
}