stickynotememo/wolf_renderer
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its a triangle

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stickynotememo
2026-01-10 10:38:18 +11:00
parent c0ccfb14c1
commit 7efb97fa5a
3 changed files with 12 additions and 14 deletions
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src/main.rs
+6 -7
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@@ -49,15 +49,14 @@ fn main() {
let mut scene = vec![Object { let mut scene = vec![Object {
vertices: vec![ vertices: vec![
// Point3D(0.0, f64::MAX / 2.0, 1.0), Point3D(0.0, f64::MAX / 2.0, 0.0),
// Point3D(f64::MAX / 2.0, -f64::MAX / 2.0, 1.0), Point3D(f64::MAX / 2.0, -f64::MAX / 2.0, 0.0),
// Point3D(-f64::MAX / 2.0, -f64::MAX / 2.0, 1.0), Point3D(-f64::MAX / 2.0, -f64::MAX / 2.0, 0.0),
// Point3D(0.0, 0.0, f64::MAX / 2.0),
// Point3D(0.0, 0.0, 0.0),
Point3D(f64::MAX / 2.0, f64::MAX / 2.0, 0.0)
], ],
edges: vec![ edges: vec![
(Point3D(0.0, 0.0, 0.0), Point3D(f64::MAX / 2.0, f64::MAX / 2.0, 0.0)) (Point3D(0.0, f64::MAX / 2.0, 0.0), Point3D(f64::MAX / 2.0, -f64::MAX / 2.0, 0.0)),
(Point3D(f64::MAX / 2.0, -f64::MAX / 2.0, 0.0), Point3D(-f64::MAX / 2.0, -f64::MAX / 2.0, 0.0)),
(Point3D(-f64::MAX / 2.0, -f64::MAX / 2.0, 0.0), Point3D(0.0, f64::MAX / 2.0, 0.0))
], ],
}]; }];
src/points.rs
+2 -2
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@@ -1,6 +1,6 @@
use crate::consts::*; use crate::consts::*;
#[derive(Debug)] #[derive(Debug, Clone, Copy)]
pub struct Point2D(pub f64, pub f64); pub struct Point2D(pub f64, pub f64);
impl Point2D { impl Point2D {
pub fn to_canvas_coordinates(&self) -> Point3D { pub fn to_canvas_coordinates(&self) -> Point3D {
@@ -18,7 +18,7 @@ impl Point2D {
} }
} }
#[derive(Debug)] #[derive(Debug, Clone, Copy)]
pub struct Point3D(pub f64, pub f64, pub f64); pub struct Point3D(pub f64, pub f64, pub f64);
impl Point3D { impl Point3D {
pub fn to_screen_coordinates(&self) -> Point2D { pub fn to_screen_coordinates(&self) -> Point2D {
src/render.rs
+4 -5
View File
@@ -13,7 +13,7 @@ fn to_rgb((red, green, blue): Subpixels) -> Pixel {
pixel pixel
} }
const fn index_buffer(buf: &mut [u32], x: f64, y: f64) -> &mut u32 { fn index_buffer(buf: &mut [u32], x: f64, y: f64) -> &mut u32 {
let x = x.round_ties_even(); // Banker's round let x = x.round_ties_even(); // Banker's round
let y = y.round_ties_even(); let y = y.round_ties_even();
@@ -41,13 +41,11 @@ pub fn render(t: u128, scene: &Scene, buf: &mut [u32]) {
} }
for edge in &obj.edges { // Draw lines for edge in &obj.edges { // Draw lines
dbg!(&edge.0, &edge.1);
let start = edge.0.to_screen_coordinates(); let start = edge.0.to_screen_coordinates();
let end = edge.1.to_screen_coordinates(); let end = edge.1.to_screen_coordinates();
dbg!(&start, &end);
if (end.0 - start.0).abs() == 0.0 { // Vertical line case - m is undefined if (end.0 - start.0).abs() == 0.0 { // Vertical line case - m is undefined
for y in (start.0.min(end.0) as u32)..(end.0.max(start.0) + 1.0) as u32 { for y in (start.1.min(end.1) as u32)..(end.1.max(start.1) + 1.0) as u32 {
*index_buffer(buf, end.0, y as f64) = to_rgb((255, 255, 255)); *index_buffer(buf, end.0, y as f64) = to_rgb((255, 255, 255));
} }
continue continue
@@ -56,7 +54,8 @@ pub fn render(t: u128, scene: &Scene, buf: &mut [u32]) {
let m = (end.1 - start.1) / (end.0 - start.0); // m = rise/run let m = (end.1 - start.1) / (end.0 - start.0); // m = rise/run
let c = start.1 as f64 - m * start.0 as f64; // c = y - mx let c = start.1 as f64 - m * start.0 as f64; // c = y - mx
for x in (start.0 as usize)..(end.0 as usize) { dbg!(start, end, "===");
for x in (start.0.min(end.0) as usize)..(end.0.max(start.0) as usize) {
let x = x as f64; let x = x as f64;
let y = m * x + c; // y = mx + c let y = m * x + c; // y = mx + c
*index_buffer(buf, x, y) = to_rgb((255, 255, 255)); *index_buffer(buf, x, y) = to_rgb((255, 255, 255));