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-rw-r--r--src/grid.rs32
1 files changed, 15 insertions, 17 deletions
diff --git a/src/grid.rs b/src/grid.rs
index 38efaba..029a196 100644
--- a/src/grid.rs
+++ b/src/grid.rs
@@ -3,10 +3,7 @@
3 3
4use sdl2::{pixels::Color, rect::Point, render::Canvas, video::Window}; 4use sdl2::{pixels::Color, rect::Point, render::Canvas, video::Window};
5 5
6use crate::{ 6use crate::{consts::colors::*, rect};
7 consts::{colors::*, ANGLE},
8 rect,
9};
10 7
11#[derive(Debug, Copy, Clone)] 8#[derive(Debug, Copy, Clone)]
12pub enum GridKind { 9pub enum GridKind {
@@ -83,22 +80,23 @@ impl Grid {
83 canvas.draw_lines(&horizontals[..]).unwrap(); 80 canvas.draw_lines(&horizontals[..]).unwrap();
84 } 81 }
85 GridKind::Isometric => { 82 GridKind::Isometric => {
86 // tan 26.525 ~= 0.5
87 canvas.set_clip_rect(Some(rect!(x, y, width * cs, height * cs))); 83 canvas.set_clip_rect(Some(rect!(x, y, width * cs, height * cs)));
88 for i in (0..2 * height + width).step_by(4) { 84 for i in (0..2 * height + width).step_by(4) {
89 let begin = Point::from(((i * cs) as i32, 0i32)); 85 let begin = ((i * cs) as i32, 0i32);
90 let end = Point::from((0i32, ((i * cs) as f64 * 0.5).floor() as i32)); 86 let end = (0i32, (i * cs) as i32 / 2);
91 canvas.draw_line(*start + begin, *start + end).unwrap(); 87 canvas
92 } 88 .draw_line(*start + begin.into(), *start + end.into())
93 for j in (0..height + width / 2).step_by(2) { 89 .unwrap();
94 let idx = (j as i32 - (width as i32 / 2)) * cs as i32; 90
95 let begin = Point::from((-100i32, idx)); 91 let begin_m = ((i as i32 - 2 * height as i32) * cs as i32, 0i32);
96 let end = Point::from(( 92 let end_m = (
97 (width * cs) as i32, 93 (width * cs) as i32,
98 (idx as f64 + (width * cs) as f64 * ANGLE.to_radians().tan()).floor() 94 ((width + 2 * height - i) * cs) as i32 / 2,
99 as i32, 95 );
100 )); 96
101 canvas.draw_line(*start + begin, *start + end).unwrap(); 97 canvas
98 .draw_line(*start + begin_m.into(), *start + end_m.into())
99 .unwrap();
102 } 100 }
103 canvas.set_clip_rect(None); 101 canvas.set_clip_rect(None);
104 } 102 }