fly/fgdata
1
0
Fork 0
Code Activity

HDR: Fix Earth appearing to be "rounder" than normal

Browse source 
We have to compensate for the fact that the sky-view LUT contains the view from the camera, but the skydome remains fixed on the ground.
This commit is contained in:
Fernando García Liñán 2021-07-29 11:55:01 +02:00
parent af29642423
commit a00f7ddfaf
1 changed files with 5 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
Shaders/HDR/skydome.vert
View file

@ -11,6 +11,10 @@ uniform mat4 osg_ModelViewProjectionMatrix;
void main()
{
gl_Position = osg_ModelViewProjectionMatrix * pos;
vRayDir = normalize(pos.xyz);
// Get the camera height (0 being the ground)
vec4 groundPoint = osg_ModelViewMatrix * vec4(0.0, 0.0, 0.0, 1.0);
float altitude = length(groundPoint);
// Compensate for the skydome being fixed on the ground
vRayDir = normalize(pos.xyz - vec3(0.0, 0.0, altitude));
vRayDirView = (osg_ModelViewMatrix * vec4(vRayDir, 0.0)).xyz;
}