27 lines
706 B
Rust
27 lines
706 B
Rust
use glam::{Mat4, Vec2, Vec3};
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use vulkano::buffer::BufferContents;
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// binary compatible mat4 which could be transparently used by vulkano BufferContents
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#[repr(C)]
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#[derive(Clone, Copy, Debug, PartialEq, BufferContents)]
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pub struct WMat4(pub [f32; 16]);
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impl WMat4 {
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pub fn from_glam(mat: &Mat4) -> Self {
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Self(*mat.as_ref())
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}
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}
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impl Default for WMat4 {
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fn default() -> Self {
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Self(*Mat4::IDENTITY.as_ref())
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}
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}
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// works just like CSS transform-origin 50% 50%
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pub fn centered_matrix(box_size: Vec2, input: &Mat4) -> Mat4 {
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Mat4::from_translation(Vec3::new(box_size.x / 2.0, box_size.y / 2.0, 0.0))
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* *input
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* Mat4::from_translation(Vec3::new(-box_size.x / 2.0, -box_size.y / 2.0, 0.0))
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}
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