unity3D技术之GL.MultiTexCoord3 多重纹理坐标3.docx

static function MultiTexCoord3 (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）。【狗刨学习网】In OpenGL this matches glMultiTexCoord for the given texture unit if multi-texturing is available. 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。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. 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 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);elseGL.MultiTexCoord3(1, 0, 0, 0);GL.Vertex3(0.25F, 0.25F, 0);if (flagTex)GL.MultiTexCoord3(0, 0, 1, 0);elseGL.MultiTexCoord3(1, 0, 1, 0);GL.Vertex3(0.25F, 0.75F, 0);if (flagTex)GL.MultiTexCoord3(0, 1, 1, 0);elseGL.MultiTexCoord3(1, 1, 1, 0);GL.Vertex3(0.75F, 0.75F, 0);if (flagTex)GL.MultiTexCoord3(0, 1, 0, 0);elseGL.MultiTexCoord3(1, 1, 0, 0);GL.Vertex3(0.75F, 0.25F, 0);GL.End();GL.PopMatrix();/ 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 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 主纹理 else GL.MultiTexCoord3(1,0,0,0); / second texture 第二纹理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