1 files changed, 8 insertions, 0 deletions
diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl
index f1e63d5d9..bbf7b1d65 100644
--- a/client/shaders/nodes_shader/opengl_vertex.glsl
+++ b/client/shaders/nodes_shader/opengl_vertex.glsl
@@ -4,9 +4,17 @@ uniform mat4 mWorld;
 // Color of the light emitted by the sun.
 uniform vec3 dayLight;
 uniform vec3 eyePosition;
+
+// The cameraOffset is the current center of the visible world.
+uniform vec3 cameraOffset;
 uniform float animationTimer;
 
 varying vec3 vPosition;
+// World position in the visible world (i.e. relative to the cameraOffset.)
+// This can be used for many shader effects without loss of precision.
+// If the absolute position is required it can be calculated with
+// cameraOffset + worldPosition (for large coordinates the limits of float
+// precision must be considered).
 varying vec3 worldPosition;
 
 varying vec3 eyeVec;