Description

One light, GPU layout (matches the shader's Light struct: 16 floats / 64 bytes).

KEEP IN SYNC with struct Light in metal/shaders/ChMetalRTShaderMSL.h – the field order and sizes must match exactly, the buffer is uploaded raw.

#include <ChMetalRTRenderer.h>

Public Attributes
float	pos [3]
	world position (point/spot) or direction (directional)

float	range
	max_range (informational; the attenuation itself comes from attenScale)

float	color [3]
	light color * intensity

float	type
	0 = point, 1 = directional, 2 = spot, 3 = disk, 4 = rectangle

float	dir [3]
	spot axis / disk normal / rectangle edge-1

float	cosOuter
	spot: angle_range (full cone, rad) \| rect: edge-2 .x

float	cosInner
	spot: angle_atten_rate \| rect: edge-2 .y

float	p0
	disk: radius \| rect: edge-2 .z

float	attenScale
	OptiX atten_scale: max_range > 0 ? 0.01*max_range^2 : 1.

float	constColor
	1 = constant colour (no distance attenuation), 0 = inverse-square

The documentation for this struct was generated from the following file:

Public Attributes