Synthasmagoria/transformation_visualizer
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Synthasmagoria 2026-08-28 08:23:29 +02:00
commit 5bc671936c
4 changed files with 58 additions and 45 deletions
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14
grid.odin
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@ -4,7 +4,7 @@ import "core:math/linalg"
import rl "libraries/raylib"
Grid :: struct {
cell_size: v2,
cell_size_px: v2,
zoom_previous, zoom: v2,
world_position, world_size, offset: v2,
}
@ -13,18 +13,18 @@ grid_get_zoom :: proc(zoom: v2) -> v2 {
return linalg.pow(v2(2.0), zoom)
}
grid_get_line_separation :: proc(zoom: v2, min_line_distance: f32) -> v2 {
grid_get_line_separation :: proc(zoom: v2, min_line_distance: v2) -> v2 {
zoom_factor := grid_get_zoom(zoom)
sep := linalg.pow(v2(10.0), linalg.floor(linalg.log10(min_line_distance * zoom_factor)))
for {
if sep.x / zoom_factor.x >= min_line_distance {
if sep.x / zoom_factor.x >= min_line_distance.x {
break
}
if sep.x * 2.5 / zoom_factor.x >= min_line_distance {
if sep.x * 2.5 / zoom_factor.x >= min_line_distance.x {
sep *= 2.5
break
}
if sep.x * 5.0 / zoom_factor.x >= min_line_distance {
if sep.x * 5.0 / zoom_factor.x >= min_line_distance.x {
sep *= 5.0
break
}
@ -44,15 +44,13 @@ grid_world_to_grid_matrix :: proc(zoom, offset: v2) -> mat3 {
linalg.matrix3_scale(v3{**zoom_amount, 1.0}))
}
import "core:fmt"
draw_grid :: proc(grid: Grid, text_draw, text_clip: rect2) {
world_to_grid_matrix := grid_world_to_grid_matrix(grid.zoom, grid.offset)
grid_to_world_matrix := linalg.inverse(world_to_grid_matrix)
grid_world_br := grid.world_position + grid.world_size
grid_color := rl.Color{64, 64, 64, 255}
sep := grid_get_line_separation(grid.zoom, 32.0)
sep := grid_get_line_separation(grid.zoom, grid.cell_size_px)
tl := (v3{**grid.world_position, 1.0} * world_to_grid_matrix).xy
tl = linalg.floor(tl / sep) * sep
br := (v3{**grid_world_br, 1.0} * world_to_grid_matrix).xy