strips/voxelotl-engine
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rotating flip flags

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a dinosaur
2024-09-21 10:21:26 +10:00
parent 1f5c59fe77
commit 9640a4042f
4 changed files with 216 additions and 36 deletions
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22
Sources/Voxelotl/Renderer/SpriteBatch.swift
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@ -64,7 +64,7 @@ public struct SpriteBatch {
let bias = origin / SIMD2(size)
self.drawQuad(texture, .positions(position, size * scale, angle, bias), texCoord, color: color)
} else {
self.drawQuad(texture, .positions(position - origin, size * scale), texCoord, color: color)
self.drawQuad(texture, .positions(position - origin * scale, size * scale), texCoord, color: color)
}
}
@ -83,7 +83,7 @@ public struct SpriteBatch {
let bias = SIMD2(origin) / SIMD2(size)
self.drawQuad(texture, .positions(position, size * scale, angle, bias), texCoord, color: color)
} else {
self.drawQuad(texture, .positions(position, size * scale), texCoord, color: color)
self.drawQuad(texture, .positions(position - origin * scale, size * scale), texCoord, color: color)
}
}
@ -345,12 +345,11 @@ fileprivate extension SpriteBatch.Quad {
v10: SIMD2<Float>(0, 0), v11: SIMD2<Float>(1, 0))
static func texcoords(_ flip: Sprite.Flip) -> Self {
let flipX = flip.contains(.x), flipY = flip.contains(.y)
//TODO: diag
let flipX = flip.contains(.horz), flipY = flip.contains(.vert), flipD = flip.contains(.diag)
return .init(
v00: .init(flipX ? 1 : 0, flipY ? 0 : 1),
v01: .init(flipX ? 0 : 1, flipY ? 0 : 1),
v10: .init(flipX ? 1 : 0, flipY ? 1 : 0),
v01: flipD ? .init(flipX ? 1 : 0, flipY ? 1 : 0) : .init(flipX ? 0 : 1, flipY ? 0 : 1),
v10: flipD ? .init(flipX ? 0 : 1, flipY ? 0 : 1) : .init(flipX ? 1 : 0, flipY ? 1 : 0),
v11: .init(flipX ? 0 : 1, flipY ? 1 : 0))
}
@ -363,14 +362,17 @@ fileprivate extension SpriteBatch.Quad {
}
static func texcoords(_ texSize: Size<Int>, _ source: Rect<Float>, _ flip: Sprite.Flip) -> Self {
let flipX = flip.contains(.x), flipY = flip.contains(.y)
let flipX = flip.contains(.horz), flipY = flip.contains(.vert), flipD = flip.contains(.diag)
let invSize = 1 / Size<Float>(texSize)
let st = Extent(source) * invSize
//TODO: diag
return .init(
v00: .init(flipX ? st.right : st.left, flipY ? st.bottom : st.top),
v01: .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top),
v10: .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom),
v01: flipD
? .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom)
: .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top),
v10: flipD
? .init(flipX ? st.left : st.right, flipY ? st.bottom : st.top)
: .init(flipX ? st.right : st.left, flipY ? st.top : st.bottom),
v11: .init(flipX ? st.left : st.right, flipY ? st.top : st.bottom))
}
}