92 lines
2.4 KiB
Odin
92 lines
2.4 KiB
Odin
package engine
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import "core:testing"
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@(test)
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to_clip_corners :: proc(t: ^testing.T) {
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// top-left pixel (0,0) -> clip (-1, 1) with y-flip
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p := to_clip(0, 0, 800, 600)
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testing.expect_value(t, p[0], f32(-1))
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testing.expect_value(t, p[1], f32(1))
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// bottom-right pixel (sw, sh) -> clip (1, -1)
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p = to_clip(800, 600, 800, 600)
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testing.expect_value(t, p[0], f32(1))
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testing.expect_value(t, p[1], f32(-1))
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// center
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p = to_clip(400, 300, 800, 600)
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testing.expect_value(t, p[0], f32(0))
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testing.expect_value(t, p[1], f32(0))
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}
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@(test)
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sprite_quad_origin_feet :: proc(t: ^testing.T) {
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o := sprite_quad_origin({400, 500}, {100, 200}, {0.5, 1.0})
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testing.expect_value(t, o.x, f32(350))
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testing.expect_value(t, o.y, f32(300))
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}
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@(test)
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sprite_quad_origin_center :: proc(t: ^testing.T) {
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o := sprite_quad_origin({400, 500}, {100, 200}, {0.5, 0.5})
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testing.expect_value(t, o.x, f32(350))
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testing.expect_value(t, o.y, f32(400))
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}
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@(test)
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frame_uvs_unflipped :: proc(t: ^testing.T) {
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u0, v0, u1, v1 := frame_uvs({10, 20, 30, 40}, 100, 200, false)
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testing.expect_value(t, u0, f32(0.1))
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testing.expect_value(t, v0, f32(0.1))
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testing.expect_value(t, u1, f32(0.4))
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testing.expect_value(t, v1, f32(0.3))
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testing.expect(t, u0 < u1, "unflipped UVs should have u0 < u1")
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}
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@(test)
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frame_uvs_flipped :: proc(t: ^testing.T) {
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a0, _, a1, _ := frame_uvs({10, 20, 30, 40}, 100, 200, false)
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b0, v0, b1, v1 := frame_uvs({10, 20, 30, 40}, 100, 200, true)
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testing.expect_value(t, b0, a1)
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testing.expect_value(t, b1, a0)
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testing.expect_value(t, v0, f32(0.1))
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testing.expect_value(t, v1, f32(0.3))
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}
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@(test)
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sprite_feet_quad_no_flip :: proc(t: ^testing.T) {
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// feet (400,500), source 100x200, pivot feet, trim (10,20), packed 80x160
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x0, y0, x1, y1 := sprite_feet_quad(
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{400, 500},
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100,
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200,
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{10, 20},
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{80, 160},
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{0.5, 1.0},
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false,
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)
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testing.expect_value(t, x0, f32(360)) // 400 - 50 + 10
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testing.expect_value(t, y0, f32(320)) // 500 - 200 + 20
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testing.expect_value(t, x1, f32(440))
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testing.expect_value(t, y1, f32(480))
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}
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@(test)
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sprite_feet_quad_flip_x :: proc(t: ^testing.T) {
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x0, y0, x1, y1 := sprite_feet_quad(
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{400, 500},
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100,
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200,
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{5, 20},
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{80, 160},
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{0.5, 1.0},
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true,
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)
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// canvas_left = 350; trim_x_draw = 100 - 5 - 80 = 15 → x0 = 365
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testing.expect_value(t, x0, f32(365))
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testing.expect_value(t, y0, f32(320))
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testing.expect_value(t, x1, f32(445))
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testing.expect_value(t, y1, f32(480))
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}
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