modelViewMatrix

Danger

This uniform only works with the “core profile” in Minecraft 1.17 and newer. It is recommended to use the “compatibility profile” with Iris for better support.

uniform mat4 modelViewMatrix;

Transforms coordinates from model/local space to view/eye space.

Equal to mat4(1.0) in begin, prepare, deferred, composite and final programs.

vec3 model_pos = vaPosition + chunkOffset;
vec4 view_pos = modelViewMatrix * vec4(model_pos, 1.0);
vec4 clip_pos = projectionMatrix * view_pos;

gl_Position = clip_pos;

Equivalent to gl_ModelViewMatrix in the compatibility profile and older GLSL versions.

vec3 model_pos = gl_Vertex.xyz;
vec4 view_pos = gl_ModelViewMatrix * vec4(model_pos, 1.0);
vec4 clip_pos = gl_ProjectionMatrix * view_pos;

gl_Position = clip_pos;