unity3D技术之GL.MultiTexCoord3 多重纹理坐标3

static functionMultiTexCoord3(unit:
int,x:
float,y:
float,z:
float) :
void
Description描述
Sets current texture coordinate (x,y,z) to the actual texture unit.
设置纹理(x,y,z)坐标对于当前的纹理单元（多重纹理）。

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In OpenGL this matches glMultiTexCoord for the given texture unit if multi-texturing isavailable. On other graphics APIs the same functionality is emulated.
这个函数和OpenGL中的glMultiTexCoord（多重纹理）一样。

其它的图形API也有对应的功能。

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 thefinal coordinate. This would be mostly useful for water reflections and similar things.Z坐标用在以下情况：
1.六面体纹理。

2.投影纹理。

Z有X，Y坐标得到。

例如水面反射效果。

This function can only be called between GL.Begin and GL.End functions.
这个函数只能在GL.Begin和GL.End之间使用。

C#
JavaScript
// Changes between two textures assigned to a material
// When pressed space
//当按下空格键，在两个纹理之间改变指定到一个材质
var mat :
Material;
private var flagTex :
boolean = true;
function Update() {
if (Input.GetKeyDown(KeyCode.Space)) {
if(flagTex) {
flagTex = false;
} else {}}}function OnPostRender() {
if (!mat) {
Debug.LogError("Please Assign a material on theflagTex = true; inspector");}GL.PushMatrix();
mat.SetPass
(1);
GL.LoadOrtho();
GL.Begin(GL.QUADS);
if (flagTex) {
GL.MultiTexCoord3(0,0,0,0); // main texture主纹理return;
} else {}GL.Vertex3(
0.25,
0.25,0);
if (flagTex) {
GL.MultiTexCoord3(0,0,1,0);
GL.MultiTexCoord3(1,0,0,0); // second texture第二纹理} else { GL.MultiTexCoord3(1,0,1,0);
}}
GL.Vertex3(
0.25,
0.75,0);
if (flagTex) {
GL.MultiTexCoord3(0,1,1,0);
} else {}GL.Vertex3(
0.75,
0.75,0);
if (flagTex) {
GL.MultiTexCoord3(0,1,0,0);
GL.MultiTexCoord3(1,1,1,0);
} else {}GL.Vertex3(
0.75,
0.25,0);
GL.End();
GL.PopMatrix();GL.MultiTexCoord3(1,1,0,0);。