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Created a function for the conversion of coordinates from algebra space to screen space. Typo.

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Lily Iliana Luna Ylva Anderson Grigaitis
2025-08-20 20:48:21 -05:00
parent 87965cafb5
commit 9f5775a99d
2 changed files with 14 additions and 8 deletions
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20
src/lib.rs
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@@ -84,10 +84,15 @@ fn point_to_cga(x: f64, y: f64) -> CGA {
0.5*mag_sqr*n_vec + ux*x_vec + uy*y_vec - 0.5*n_bar
}
fn point_to_screen_space(x: f64, y: f64) -> (f64, f64) {
let screen_x = x*RADIUS + CENTER_X;
let screen_y = y*RADIUS + CENTER_Y;
(screen_x, screen_y)
}
fn draw_point(context: &CanvasRenderingContext2d, point: &CGA) {
//Naively assume we are given a valid point
let x = point[1]*RADIUS + CENTER_X;
let y = point[2]*RADIUS + CENTER_Y;
let (x,y) = point_to_screen_space(point[E1], point[E2]);
context.begin_path();
context.set_fill_style_str(RED);
@@ -125,8 +130,10 @@ fn draw_line(context: &CanvasRenderingContext2d, line: &CGA) {
let p1y = py + ty * 1000.;
let p2x = px - tx * 1000.;
let p2y = py - ty * 1000.;
context.move_to(p1x*RADIUS + CENTER_X, p1y*RADIUS + CENTER_Y);
context.line_to(p2x*RADIUS + CENTER_X, p2y*RADIUS + CENTER_Y);
let (canvas_x1, canvas_y1) = point_to_screen_space(p1x, p1y);
let (canvas_x2, canvas_y2) = point_to_screen_space(p2x, p2y);
context.move_to(canvas_x1, canvas_y1);
context.line_to(canvas_x2, canvas_y2);
}
} else {
@@ -139,12 +146,11 @@ fn draw_line(context: &CanvasRenderingContext2d, line: &CGA) {
//draw_point(context, &point_to_cga(c_x, c_y));
//Convert into Canvas Space
let canvas_cx = c_x*RADIUS + CENTER_X;
let canvas_cy = c_y*RADIUS + CENTER_Y;
let (canvas_x, canvas_y) = point_to_screen_space(c_x, c_y);
let canvas_r = r*RADIUS;
//Draw
context.arc(canvas_cx, canvas_cy, canvas_r, 0., TWO_PI).unwrap();
context.arc(canvas_x, canvas_y, canvas_r, 0., TWO_PI).unwrap();
}
context.stroke();
}