Sky

type Light struct {
	Enabled   bool.X   // true if LIGHTX is visible and in the scene. If false, other light properties may be garbage.
	Energy    float.X  // Energy multiplier for LIGHTX.
	Direction vec3.XYZ // Direction that LIGHTX is facing.
	Color     vec3.RGB // Color of LIGHTX.
	Size      float.X  // Angular diameter of LIGHTX in the sky. Expressed in radians. For reference, the sun from earth is about .0087 radians (0.5 degrees).
}

type Lighting struct {
	Color vec3.RGB  `gd:"COLOR"` // Color of the light.
	Alpha float.X   `gd:"ALPHA"` // Alpha of the light.
	Fog   vec4.RGBA `gd:"FOG"`   // Fog color of the light.
}

type RenderMode string

type Shader[T gdclass.Interface] struct {
	ShaderMaterial.Extension[T]
}

type Snapshot struct {
	CameraPosition   vec3.XYZ                       `gd:"POSITION"`            // Camera position in world space.
	Radiance         texture.CubeSampler[vec4.RGBA] `gd:"RADIANCE"`            // Radiance cubemap. Can only be read from during background pass. Check !AT_CUBEMAP_PASS before using.
	AtHalfResPass    bool.X                         `gd:"AT_HALF_RES_PASS"`    // True if the shader is being processed at half resolution pass.
	AtQuarterResPass bool.X                         `gd:"AT_QUARTER_RES_PASS"` // True if the shader is being processed at quarter resolution pass.
	AtCubemapPass    bool.X                         `gd:"AT_CUBEMAP_PASS"`     // True if the shader is being processed at cubemap pass.
	EyeDirection     vec3.XYZ                       `gd:"EYE_DIRECTION"`       // Normalized direction of current pixel. Use this as your basic direction for procedural effects.
	ScreenUV         vec2.XY                        `gd:"SCREEN_UV"`           // Screen UV coordinate for current pixel. Used to map a texture to the full screen.
	SkyCoords        vec2.XY                        `gd:"SKY_COORDS"`          // Sphere UV. Used to map a panorama texture to the sky.
	HalfResColor     vec4.RGBA                      `gd:"HALF_RES_COLOR"`      // Color value of corresponding pixel from half resolution pass. Uses linear filter.
	QuarterResColor  vec4.RGBA                      `gd:"QUARTER_RES_COLOR"`   // Color value of corresponding pixel from quarter resolution pass. Uses linear filter.
}