Distant Horizons•3mo ago

gl_TextureMatrix doesn't exist

I'm trying to make my first shader following this tutorial, and I want to add Distant Horizons support According to the video and the iris docs DH uses gl_MultiTexCoord2, which according to the video, requires gl_TextureMatrix[2]. However, according to minecraft, that doesn't exist, as it gives me this error:

dh_terrain.vsh: dh_terrain.vsh: ERROR: 0:61: 'gl_TextureMatrix' : undeclared identifier 
ERROR: 0:61: 'gl_TextureMatrix' : left of '[' is not of type array, matrix, or vector

dh_terrain.vsh: dh_terrain.vsh: ERROR: 0:61: 'gl_TextureMatrix' : undeclared identifier 
ERROR: 0:61: 'gl_TextureMatrix' : left of '[' is not of type array, matrix, or vector

please help me I have no idea what I'm doing

Samuel Gerkin

YouTube

I coded a Minecraft Shader with Distant Horizons - Code Your Own Sh...

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GitHub

ShaderDoc/dh-support.md at master · IrisShaders/ShaderDoc

Documentation of Minecraft shaders. Contribute to IrisShaders/ShaderDoc development by creating an account on GitHub.

Solution:

There is no gl_TextureMatrix[2], as such, you should use gl_TextureMatrix[1] * gl_MultiTexCoord1 instead. See the pinned comment in that same video you linked for the errata.

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4 Replies

🌸 lemunhed 🌸OP•3mo ago

in case you're curious, this is the vertex shader that breaks:

#version 460 compatibility

// out vec2 texCoord;
out vec4 blockColor;
out vec2 lightMapCoords;

void main() {

    blockColor = gl_Color;
    lightMapCoords = (gl_TextureMatrix[2] * gl_MultiTexCoord2).xy;

    gl_Position = ftransform();
}

#version 460 compatibility

// out vec2 texCoord;
out vec4 blockColor;
out vec2 lightMapCoords;

void main() {

    blockColor = gl_Color;
    lightMapCoords = (gl_TextureMatrix[2] * gl_MultiTexCoord2).xy;

    gl_Position = ftransform();
}

Samalando (ping on please)•3mo ago

You should probably ask in the shaderlabs server https://discord.gg/RpzWN9S

Solution

hardester•3mo ago

There is no gl_TextureMatrix[2], as such, you should use gl_TextureMatrix[1] * gl_MultiTexCoord1 instead. See the pinned comment in that same video you linked for the errata.

🌸 lemunhed 🌸OP•3mo ago

It worked thank you so much

Gaming

Programming

gl_TextureMatrix doesn't exist

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