64 lines
1.8 KiB
WebGPU Shading Language
64 lines
1.8 KiB
WebGPU Shading Language
#define_import_path bevy_render::view
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struct ColorGrading {
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balance: mat3x3<f32>,
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saturation: vec3<f32>,
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contrast: vec3<f32>,
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gamma: vec3<f32>,
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gain: vec3<f32>,
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lift: vec3<f32>,
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midtone_range: vec2<f32>,
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exposure: f32,
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hue: f32,
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post_saturation: f32,
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}
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struct View {
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clip_from_world: mat4x4<f32>,
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unjittered_clip_from_world: mat4x4<f32>,
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world_from_clip: mat4x4<f32>,
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world_from_view: mat4x4<f32>,
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view_from_world: mat4x4<f32>,
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// Typically a right-handed projection matrix, one of either:
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//
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// Perspective (infinite reverse z)
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// ```
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// f = 1 / tan(fov_y_radians / 2)
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//
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// ⎡ f / aspect 0 0 0 ⎤
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// ⎢ 0 f 0 0 ⎥
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// ⎢ 0 0 0 -1 ⎥
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// ⎣ 0 0 near 0 ⎦
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// ```
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//
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// Orthographic
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// ```
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// w = right - left
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// h = top - bottom
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// d = near - far
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// cw = -right - left
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// ch = -top - bottom
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//
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// ⎡ 2 / w 0 0 0 ⎤
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// ⎢ 0 2 / h 0 0 ⎥
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// ⎢ 0 0 1 / d 0 ⎥
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// ⎣ cw / w ch / h near / d 1 ⎦
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// ```
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//
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// `clip_from_view[3][3] == 1.0` is the standard way to check if a projection is orthographic
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//
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// Custom projections are also possible however.
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clip_from_view: mat4x4<f32>,
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view_from_clip: mat4x4<f32>,
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world_position: vec3<f32>,
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exposure: f32,
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// viewport(x_origin, y_origin, width, height)
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viewport: vec4<f32>,
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// 6 world-space half spaces (normal: vec3, distance: f32) ordered left, right, top, bottom, near, far.
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// The normal vectors point towards the interior of the frustum.
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// A half space contains `p` if `normal.dot(p) + distance > 0.`
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frustum: array<vec4<f32>, 6>,
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color_grading: ColorGrading,
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mip_bias: f32,
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};
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