Sets current texture coordinate (x,y,z) to the actual texture unit.
In OpenGL this matches glMultiTexCoord for the given texture unit if multi-texturing is available. On other graphics APIs the same functionality is emulated.
The Z component is used only when:
1. You access a cubemap (which you access with a vector coordinate, hence x,y & z).
2. You do "projective texturing", where the X & Y coordinates are divided by Z to get the final coordinate. This would be mostly useful for water reflections and similar things.
This function can only be called between GL.Begin and GL.End functions.
// Changes between two textures assigned to a material
// When pressed space
var mat : Material;
private var flagTex : boolean = true;
function Update() {
if (Input.GetKeyDown(KeyCode.Space)) {
if(flagTex) {
flagTex = false;
} else {
flagTex = true;
}
}
}
function OnPostRender() {
if (!mat) {
Debug.LogError("Please Assign a material on the inspector");
return;
}
GL.PushMatrix();
mat.SetPass(1);
GL.LoadOrtho();
GL.Begin(GL.QUADS);
if (flagTex) {
GL.MultiTexCoord3(0,0,0,0); // main texture
} else {
GL.MultiTexCoord3(1,0,0,0); // second texture
}
GL.Vertex3(0.25,0.25,0);
if (flagTex) {
GL.MultiTexCoord3(0,0,1,0);
} else {
GL.MultiTexCoord3(1,0,1,0);
}
GL.Vertex3(0.25,0.75,0);
if (flagTex) {
GL.MultiTexCoord3(0,1,1,0);
} else {
GL.MultiTexCoord3(1,1,1,0);
}
GL.Vertex3(0.75,0.75,0);
if (flagTex) {
GL.MultiTexCoord3(0,1,0,0);
} else {
GL.MultiTexCoord3(1,1,0,0);
}
GL.Vertex3(0.75,0.25,0);
GL.End();
GL.PopMatrix();
}
using UnityEngine;
using System.Collections;
public class example : MonoBehaviour {
public Material mat;
private bool flagTex = true;
void Update() {
if (Input.GetKeyDown(KeyCode.Space))
if (flagTex)
flagTex = false;
else
flagTex = true;
}
void OnPostRender() {
if (!mat) {
Debug.LogError("Please Assign a material on the inspector");
return;
}
GL.PushMatrix();
mat.SetPass(1);
GL.LoadOrtho();
GL.Begin(GL.QUADS);
if (flagTex)
GL.MultiTexCoord3(0, 0, 0, 0);
else
GL.MultiTexCoord3(1, 0, 0, 0);
GL.Vertex3(0.25F, 0.25F, 0);
if (flagTex)
GL.MultiTexCoord3(0, 0, 1, 0);
else
GL.MultiTexCoord3(1, 0, 1, 0);
GL.Vertex3(0.25F, 0.75F, 0);
if (flagTex)
GL.MultiTexCoord3(0, 1, 1, 0);
else
GL.MultiTexCoord3(1, 1, 1, 0);
GL.Vertex3(0.75F, 0.75F, 0);
if (flagTex)
GL.MultiTexCoord3(0, 1, 0, 0);
else
GL.MultiTexCoord3(1, 1, 0, 0);
GL.Vertex3(0.75F, 0.25F, 0);
GL.End();
GL.PopMatrix();
}
}
import UnityEngine
import System.Collections
class example(MonoBehaviour):
public mat as Material
private flagTex as bool = true
def Update():
if Input.GetKeyDown(KeyCode.Space):
if flagTex:
flagTex = false
else:
flagTex = true
def OnPostRender():
if not mat:
Debug.LogError('Please Assign a material on the inspector')
return
GL.PushMatrix()
mat.SetPass(1)
GL.LoadOrtho()
GL.Begin(GL.QUADS)
if flagTex:
GL.MultiTexCoord3(0, 0, 0, 0)
else:
GL.MultiTexCoord3(1, 0, 0, 0)
GL.Vertex3(0.25F, 0.25F, 0)
if flagTex:
GL.MultiTexCoord3(0, 0, 1, 0)
else:
GL.MultiTexCoord3(1, 0, 1, 0)
GL.Vertex3(0.25F, 0.75F, 0)
if flagTex:
GL.MultiTexCoord3(0, 1, 1, 0)
else:
GL.MultiTexCoord3(1, 1, 1, 0)
GL.Vertex3(0.75F, 0.75F, 0)
if flagTex:
GL.MultiTexCoord3(0, 1, 0, 0)
else:
GL.MultiTexCoord3(1, 1, 0, 0)
GL.Vertex3(0.75F, 0.25F, 0)
GL.End()
GL.PopMatrix()