CarlaSkyLightMap Namespace Reference

Environment-map support for the sky light (the set_sky_light_map RPC). More...

Functions
CARLA_API UTextureCube *	CreateCubemapFromEquirect (const float *RGBA, int32 Width, int32 Height, int32 FaceSize=512)
	Resamples the panorama into a transient 6-face HDR cubemap (PF_FloatRGBA, FaceSize x FaceSize per face) laid out in Unreal's cubemap face convention (+X, -X, +Y, -Y, +Z, -Z, see GetCubemapVector in ReflectionEnvironmentShaders.usf), so that sampling the cube with a world direction returns the panorama value for that direction.

Detailed Description

Environment-map support for the sky light (the set_sky_light_map RPC).

Convention of the input panorama (equirectangular, CARLA world frame, which is Unreal's left-handed X forward / Y right / Z up): column u in [0, W): azimuth phi = 2*pi * (u + 0.5) / W, measured from +X toward +Y (the same sense as a CARLA yaw: 0 = +X, 90 deg = +Y). row v in [0, H): elevation theta = pi/2 - pi * (v + 0.5) / H (row 0 = zenith, last row = nadir). direction d = (cos(theta) cos(phi), cos(theta) sin(phi), sin(theta)). Pixels are linear RGBA float, row-major, top row first. Values are scene radiance in whatever unit the caller wants; the sky light's Intensity is the multiplier on top.

Function Documentation

CreateCubemapFromEquirect()

UTextureCube * CarlaSkyLightMap::CreateCubemapFromEquirect	(	const float *	RGBA,
		int32	Width,
		int32	Height,
		int32	FaceSize = 512
	)

Resamples the panorama into a transient 6-face HDR cubemap (PF_FloatRGBA, FaceSize x FaceSize per face) laid out in Unreal's cubemap face convention (+X, -X, +Y, -Y, +Z, -Z, see GetCubemapVector in ReflectionEnvironmentShaders.usf), so that sampling the cube with a world direction returns the panorama value for that direction.

Returns nullptr on bad input. The texture is NOT rooted: the caller owns keeping it alive.

Definition at line 57 of file SkyLightMap.cpp.

Referenced by FCarlaServer::FPimpl::BindActions().