unity3D技术之EditorGUI.DrawPreviewTexture 绘制预览纹理

static function DrawPreviewTexture(position: Rect, image: Texture, mat: Material= null, scaleMode : ScaleMode = ScaleMode.StretchToFill, imageAspect : float = 0) : void

Parameters参数

?position

Rectangle on the screen to draw the texture within.

屏幕上绘制纹理的矩形区域

?image

Texture to display. // 显示的纹理

?scaleMode

How to scale the image when the aspect ratio of it doesn't fit the aspect ratio to be drawn within.

当纹理的尺寸不适合这个区域时如何缩放

?mat

Material to be used when drawing the texture.

当绘制纹理时使用的材质

?imageAspect

Aspect ratio to use for the source image. If 0 (the default), the aspect ratio from the image is used.

用于源图片的纵横比。如果为0（默认），使用源图片的纵横比

Description描述

Draws the texture within a rectangle.

在矩形内绘制纹理。

If mat is null (the default), an appropriate material will be chosen for a RGBM or doubleLDR lightmap or a normal map and the fallback blit material will be chosen otherwise.

如果mat为空（默认），一个适当的材料将被选择为RGBM或doubleLDR lightmap或者一个正常的贴图和背景材料，否则将使用被选择的材质

Preview Texture in an Editor Window.

编辑器中的预览纹理。

// Load a texture, display the texture, display its alpha channel and

// show a preview of the inverted texture

//加载并这个纹理，显示其Alpha通道，并显示该纹理的反向预览【狗刨学习网】

class EditorGUITextures extends EditorWindow {

var texture : T exture2D;

var invertedTexture : Texture2D;

var showInverted = false;

@MenuItem("Examples/Texture Previewer")

static function Init() {

var window = GetWindow(EditorGUITextures);

window.position = Rect(0,0,400, 200);

window.Show();

}

function OnGUI() {

texture = EditorGUI.ObjectField(Rect(3,3,200,20),

"Add a Texture:",

texture,

Texture);

if(GUI.Button(Rect(208,3, position.width - 210, 20),"Process Inverted")) {

if(invertedTexture)

DestroyImmediate(invertedTexture);

//Copy the new texture

//复制新的纹理

invertedTexture = new Texture2D(texture.width,

texture.height,

texture.format,

(texture.mipmapCount != 0));

for (var m : int = 0; m < texture.mipmapCount; m++)

invertedTexture.SetPixels(texture.GetPixels(m), m);

InvertColors();

showInverted = true;

}

if(texture) {

EditorGUI.PrefixLabel(Rect(25,45,100,15),0,GUIContent("Preview:"));

EditorGUI.DrawPreviewT exture(Rect(25,60,100,100),texture);

EditorGUI.PrefixLabel(Rect(150,45,100,15),0,GUIContent("Alpha:"));

EditorGUI.DrawTextureAlpha(Rect(150,60,100,100),texture);

EditorGUI.PrefixLabel(Rect(275,45,100,15),0,GUIContent("Inverted:"));

if(showInverted)

EditorGUI.DrawPreviewT exture(Rect(275,60,100,100),invertedTexture);

if(GUI.Button(Rect(3,position.height - 25, position.width-6,20),"Clear texture")) {

texture = EditorGUIUtility.whiteTexture;

showInverted = false;

}

} else {

EditorGUI.PrefixLabel(

Rect(3,position.height - 25,position.width - 6, 20),

0,

GUIContent("No texture found"));

}

}

function InvertColors() {

for (var m : int = 0; m < invertedTexture.mipmapCount; m++) {

var c : Color[] = invertedTexture.GetPixels(m);

for (var i : int = 0 ;i < c.Length; i++) {

c[i].r = 1 - c[i].r;

c[i].g = 1 - c[i].g;

c[i].b = 1 - c[i].b;

}

invertedTexture.SetPixels(c, m);

}

invertedTexture.Apply();

}

function OnInspectorUpdate() {

Repaint();

}

}