1. 整體類圖
NGUI_Class.png
從類圖可以看出，UISprite和UITexture都是繼承UIBasicSprite，UIBasicSprite則繼承UIWidget。
2. UIBasicSprite
2.1 作用
主要提供圖片類型屬性，flip屬性及提供統(tǒng)一填充幾何信息的方法（Fill）。
2.2 圖片類型
public enum Type
{
Simple,
Sliced,
Tiled,
Filled,
Advanced,
}
每一種Type的解釋及適用場景：
Simple：標準的Sprite，自適應大小
Sliced：九宮格切片，創(chuàng)建固定邊框控件的最佳選擇。邊框固定，圖片中間做拉伸(縮放)，如角色頭像，按鈕背景
Tiled：平鋪，一個Sprite縮放填充整個區(qū)域，如背景平鋪
Filed：每個Sprite有一個單獨的參數(shù)(file Amout)來控制哪些是可見的，用來制作技能CD冷卻時間或進度條
Advanced：高級的，自定義左右上下中的Sprite Type
關于Type的具體信息和示例可以參考這篇文章
2.3 Flip類型
public enum Flip
{
Nothing,
Horizontally,
Vertically,
Both,
}
2.4 Fill方法
Fill方法根據(jù)圖片類型調用SimpleFill/SlicedFill/FilledFill/TiledFill/AdvancedFill方法填充幾何信息
protected void Fill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols, Rect outer, Rect inner)
{
mOuterUV = outer;
mInnerUV = inner;
switch (type)
{
case Type.Simple:
SimpleFill(verts, uvs, cols);
break;
case Type.Sliced:
SlicedFill(verts, uvs, cols);
break;
case Type.Filled:
FilledFill(verts, uvs, cols);
break;
case Type.Tiled:
TiledFill(verts, uvs, cols);
break;
case Type.Advanced:
AdvancedFill(verts, uvs, cols);
break;
}
}
2.5 SimpleFill
幾何信息按照左下 左上 右上 右下的順序依次填入
void SimpleFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Vector4 v = drawingDimensions;
Vector4 u = drawingUVs;
Color32 c = drawingColor;
verts.Add(new Vector3(v.x, v.y));
verts.Add(new Vector3(v.x, v.w));
verts.Add(new Vector3(v.z, v.w));
verts.Add(new Vector3(v.z, v.y));
uvs.Add(new Vector2(u.x, u.y));
uvs.Add(new Vector2(u.x, u.w));
uvs.Add(new Vector2(u.z, u.w));
uvs.Add(new Vector2(u.z, u.y));
cols.Add(c);
cols.Add(c);
cols.Add(c);
cols.Add(c);
}
2.6 SlicedFill
- 當邊界border等于Vector4.zero的時候按照Simple類型處理
- 由于Slice分成外矩形和內矩形，將外矩形和內矩形的左下，右上總共4個頂點/UV分配到mTempPos和mTempUVs臨時緩存
- Sliced的中文意思為九宮格，填充幾何信息的時候也是將圖片分成9塊進行的，按照以下規(guī)則
3 6 9
2 5 8
1 4 7
void SlicedFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Vector4 br = border * pixelSize;
if (br.x == 0f && br.y == 0f && br.z == 0f && br.w == 0f)
{
SimpleFill(verts, uvs, cols);
return;
}
Color32 c = drawingColor;
Vector4 v = drawingDimensions;
mTempPos[0].x = v.x;
mTempPos[0].y = v.y;
mTempPos[3].x = v.z;
mTempPos[3].y = v.w;
if (mFlip == Flip.Horizontally || mFlip == Flip.Both)
{
mTempPos[1].x = mTempPos[0].x + br.z;
mTempPos[2].x = mTempPos[3].x - br.x;
mTempUVs[3].x = mOuterUV.xMin;
mTempUVs[2].x = mInnerUV.xMin;
mTempUVs[1].x = mInnerUV.xMax;
mTempUVs[0].x = mOuterUV.xMax;
}
else
{
mTempPos[1].x = mTempPos[0].x + br.x;
mTempPos[2].x = mTempPos[3].x - br.z;
mTempUVs[0].x = mOuterUV.xMin;
mTempUVs[1].x = mInnerUV.xMin;
mTempUVs[2].x = mInnerUV.xMax;
mTempUVs[3].x = mOuterUV.xMax;
}
if (mFlip == Flip.Vertically || mFlip == Flip.Both)
{
mTempPos[1].y = mTempPos[0].y + br.w;
mTempPos[2].y = mTempPos[3].y - br.y;
mTempUVs[3].y = mOuterUV.yMin;
mTempUVs[2].y = mInnerUV.yMin;
mTempUVs[1].y = mInnerUV.yMax;
mTempUVs[0].y = mOuterUV.yMax;
}
else
{
mTempPos[1].y = mTempPos[0].y + br.y;
mTempPos[2].y = mTempPos[3].y - br.w;
mTempUVs[0].y = mOuterUV.yMin;
mTempUVs[1].y = mInnerUV.yMin;
mTempUVs[2].y = mInnerUV.yMax;
mTempUVs[3].y = mOuterUV.yMax;
}
for (int x = 0; x < 3; ++x)
{
int x2 = x + 1;
for (int y = 0; y < 3; ++y)
{
if (centerType == AdvancedType.Invisible && x == 1 && y == 1) continue;
int y2 = y + 1;
verts.Add(new Vector3(mTempPos[x].x, mTempPos[y].y));
verts.Add(new Vector3(mTempPos[x].x, mTempPos[y2].y));
verts.Add(new Vector3(mTempPos[x2].x, mTempPos[y2].y));
verts.Add(new Vector3(mTempPos[x2].x, mTempPos[y].y));
uvs.Add(new Vector2(mTempUVs[x].x, mTempUVs[y].y));
uvs.Add(new Vector2(mTempUVs[x].x, mTempUVs[y2].y));
uvs.Add(new Vector2(mTempUVs[x2].x, mTempUVs[y2].y));
uvs.Add(new Vector2(mTempUVs[x2].x, mTempUVs[y].y));
cols.Add(c);
cols.Add(c);
cols.Add(c);
cols.Add(c);
}
}
}
2.7 TiledFill
- 計算對應紋理貼圖的大小
- UV進行Flip處理
- 按照從左到右，從下到上不斷添加平鋪紋理的幾何信息，限制顯示區(qū)域（對頂點和UV范圍限制）
void TiledFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Texture tex = mainTexture;
if (tex == null) return;
Vector2 size = new Vector2(mInnerUV.width * tex.width, mInnerUV.height * tex.height);
size *= pixelSize;
if (tex == null || size.x < 2f || size.y < 2f) return;
Color32 c = drawingColor;
Vector4 v = drawingDimensions;
Vector4 u;
if (mFlip == Flip.Horizontally || mFlip == Flip.Both)
{
u.x = mInnerUV.xMax;
u.z = mInnerUV.xMin;
}
else
{
u.x = mInnerUV.xMin;
u.z = mInnerUV.xMax;
}
if (mFlip == Flip.Vertically || mFlip == Flip.Both)
{
u.y = mInnerUV.yMax;
u.w = mInnerUV.yMin;
}
else
{
u.y = mInnerUV.yMin;
u.w = mInnerUV.yMax;
}
float x0 = v.x;
float y0 = v.y;
float u0 = u.x;
float v0 = u.y;
while (y0 < v.w)
{
x0 = v.x;
float y1 = y0 + size.y;
float v1 = u.w;
if (y1 > v.w)
{
v1 = Mathf.Lerp(u.y, u.w, (v.w - y0) / size.y);
y1 = v.w;
}
while (x0 < v.z)
{
float x1 = x0 + size.x;
float u1 = u.z;
if (x1 > v.z)
{
u1 = Mathf.Lerp(u.x, u.z, (v.z - x0) / size.x);
x1 = v.z;
}
verts.Add(new Vector3(x0, y0));
verts.Add(new Vector3(x0, y1));
verts.Add(new Vector3(x1, y1));
verts.Add(new Vector3(x1, y0));
uvs.Add(new Vector2(u0, v0));
uvs.Add(new Vector2(u0, v1));
uvs.Add(new Vector2(u1, v1));
uvs.Add(new Vector2(u1, v0));
cols.Add(c);
cols.Add(c);
cols.Add(c);
cols.Add(c);
x0 += size.x;
}
y0 += size.y;
}
}
2.8 FilledFill
2.8.1 FillDirection
public enum FillDirection
{
Horizontal,
Vertical,
Radial90,
Radial180,
Radial360,
}
- 主要由mfillDirection（填充方式）、mfillAmount（填充量）和mInvert（是否反轉）來控制填充的效果
- 對于FillDirection.Horizontal或者FillDirection.Vertical的情況，根據(jù)mfillAmount重新計算頂點坐標和UV坐標并填入即可
- 對于FillDirection其他3種類型，但都用到RadialCut函數(shù)，里面涉及到一些三角函數(shù)的運算。Radial90畫1個矩形即可，Radial180需要分左右畫2個矩形，而Radial360則需要分四塊畫4個矩形。
void FilledFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
if (mFillAmount < 0.001f) return;
Vector4 v = drawingDimensions;
Vector4 u = drawingUVs;
Color32 c = drawingColor;
// Horizontal and vertical filled sprites are simple -- just end the sprite prematurely
if (mFillDirection == FillDirection.Horizontal || mFillDirection == FillDirection.Vertical)
{
if (mFillDirection == FillDirection.Horizontal)
{
float fill = (u.z - u.x) * mFillAmount;
if (mInvert)
{
v.x = v.z - (v.z - v.x) * mFillAmount;
u.x = u.z - fill;
}
else
{
v.z = v.x + (v.z - v.x) * mFillAmount;
u.z = u.x + fill;
}
}
else if (mFillDirection == FillDirection.Vertical)
{
float fill = (u.w - u.y) * mFillAmount;
if (mInvert)
{
v.y = v.w - (v.w - v.y) * mFillAmount;
u.y = u.w - fill;
}
else
{
v.w = v.y + (v.w - v.y) * mFillAmount;
u.w = u.y + fill;
}
}
}
mTempPos[0] = new Vector2(v.x, v.y);
mTempPos[1] = new Vector2(v.x, v.w);
mTempPos[2] = new Vector2(v.z, v.w);
mTempPos[3] = new Vector2(v.z, v.y);
mTempUVs[0] = new Vector2(u.x, u.y);
mTempUVs[1] = new Vector2(u.x, u.w);
mTempUVs[2] = new Vector2(u.z, u.w);
mTempUVs[3] = new Vector2(u.z, u.y);
if (mFillAmount < 1f)
{
if (mFillDirection == FillDirection.Radial90)
{
if (RadialCut(mTempPos, mTempUVs, mFillAmount, mInvert, 0))
{
for (int i = 0; i < 4; ++i)
{
verts.Add(mTempPos[i]);
uvs.Add(mTempUVs[i]);
cols.Add(c);
}
}
return;
}
if (mFillDirection == FillDirection.Radial180)
{
for (int side = 0; side < 2; ++side)
{
float fx0, fx1, fy0, fy1;
fy0 = 0f;
fy1 = 1f;
if (side == 0) { fx0 = 0f; fx1 = 0.5f; }
else { fx0 = 0.5f; fx1 = 1f; }
mTempPos[0].x = Mathf.Lerp(v.x, v.z, fx0);
mTempPos[1].x = mTempPos[0].x;
mTempPos[2].x = Mathf.Lerp(v.x, v.z, fx1);
mTempPos[3].x = mTempPos[2].x;
mTempPos[0].y = Mathf.Lerp(v.y, v.w, fy0);
mTempPos[1].y = Mathf.Lerp(v.y, v.w, fy1);
mTempPos[2].y = mTempPos[1].y;
mTempPos[3].y = mTempPos[0].y;
mTempUVs[0].x = Mathf.Lerp(u.x, u.z, fx0);
mTempUVs[1].x = mTempUVs[0].x;
mTempUVs[2].x = Mathf.Lerp(u.x, u.z, fx1);
mTempUVs[3].x = mTempUVs[2].x;
mTempUVs[0].y = Mathf.Lerp(u.y, u.w, fy0);
mTempUVs[1].y = Mathf.Lerp(u.y, u.w, fy1);
mTempUVs[2].y = mTempUVs[1].y;
mTempUVs[3].y = mTempUVs[0].y;
float val = !mInvert ? fillAmount * 2f - side : mFillAmount * 2f - (1 - side);
if (RadialCut(mTempPos, mTempUVs, Mathf.Clamp01(val), !mInvert, NGUIMath.RepeatIndex(side + 3, 4)))
{
for (int i = 0; i < 4; ++i)
{
verts.Add(mTempPos[i]);
uvs.Add(mTempUVs[i]);
cols.Add(c);
}
}
}
return;
}
if (mFillDirection == FillDirection.Radial360)
{
for (int corner = 0; corner < 4; ++corner)
{
float fx0, fx1, fy0, fy1;
if (corner < 2) { fx0 = 0f; fx1 = 0.5f; }
else { fx0 = 0.5f; fx1 = 1f; }
if (corner == 0 || corner == 3) { fy0 = 0f; fy1 = 0.5f; }
else { fy0 = 0.5f; fy1 = 1f; }
mTempPos[0].x = Mathf.Lerp(v.x, v.z, fx0);
mTempPos[1].x = mTempPos[0].x;
mTempPos[2].x = Mathf.Lerp(v.x, v.z, fx1);
mTempPos[3].x = mTempPos[2].x;
mTempPos[0].y = Mathf.Lerp(v.y, v.w, fy0);
mTempPos[1].y = Mathf.Lerp(v.y, v.w, fy1);
mTempPos[2].y = mTempPos[1].y;
mTempPos[3].y = mTempPos[0].y;
mTempUVs[0].x = Mathf.Lerp(u.x, u.z, fx0);
mTempUVs[1].x = mTempUVs[0].x;
mTempUVs[2].x = Mathf.Lerp(u.x, u.z, fx1);
mTempUVs[3].x = mTempUVs[2].x;
mTempUVs[0].y = Mathf.Lerp(u.y, u.w, fy0);
mTempUVs[1].y = Mathf.Lerp(u.y, u.w, fy1);
mTempUVs[2].y = mTempUVs[1].y;
mTempUVs[3].y = mTempUVs[0].y;
float val = mInvert ?
mFillAmount * 4f - NGUIMath.RepeatIndex(corner + 2, 4) :
mFillAmount * 4f - (3 - NGUIMath.RepeatIndex(corner + 2, 4));
if (RadialCut(mTempPos, mTempUVs, Mathf.Clamp01(val), mInvert, NGUIMath.RepeatIndex(corner + 2, 4)))
{
for (int i = 0; i < 4; ++i)
{
verts.Add(mTempPos[i]);
uvs.Add(mTempUVs[i]);
cols.Add(c);
}
}
}
return;
}
}
// Fill the buffer with the quad for the sprite
for (int i = 0; i < 4; ++i)
{
verts.Add(mTempPos[i]);
uvs.Add(mTempUVs[i]);
cols.Add(c);
}
}
2.9 AdvancedFill
public enum AdvancedType
{
Invisible,
Sliced,
Tiled,
}
根據(jù)border邊界將圖片區(qū)域分成9塊，每塊可以獨立設置AdvancedType圖片類型，然后根據(jù)每塊的類型進行幾何信息填充
void AdvancedFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Texture tex = mainTexture;
if (tex == null) return;
Vector4 br = border * pixelSize;
if (br.x == 0f && br.y == 0f && br.z == 0f && br.w == 0f)
{
SimpleFill(verts, uvs, cols);
return;
}
Color32 c = drawingColor;
Vector4 v = drawingDimensions;
Vector2 tileSize = new Vector2(mInnerUV.width * tex.width, mInnerUV.height * tex.height);
tileSize *= pixelSize;
if (tileSize.x < 1f) tileSize.x = 1f;
if (tileSize.y < 1f) tileSize.y = 1f;
mTempPos[0].x = v.x;
mTempPos[0].y = v.y;
mTempPos[3].x = v.z;
mTempPos[3].y = v.w;
if (mFlip == Flip.Horizontally || mFlip == Flip.Both)
{
mTempPos[1].x = mTempPos[0].x + br.z;
mTempPos[2].x = mTempPos[3].x - br.x;
mTempUVs[3].x = mOuterUV.xMin;
mTempUVs[2].x = mInnerUV.xMin;
mTempUVs[1].x = mInnerUV.xMax;
mTempUVs[0].x = mOuterUV.xMax;
}
else
{
mTempPos[1].x = mTempPos[0].x + br.x;
mTempPos[2].x = mTempPos[3].x - br.z;
mTempUVs[0].x = mOuterUV.xMin;
mTempUVs[1].x = mInnerUV.xMin;
mTempUVs[2].x = mInnerUV.xMax;
mTempUVs[3].x = mOuterUV.xMax;
}
if (mFlip == Flip.Vertically || mFlip == Flip.Both)
{
mTempPos[1].y = mTempPos[0].y + br.w;
mTempPos[2].y = mTempPos[3].y - br.y;
mTempUVs[3].y = mOuterUV.yMin;
mTempUVs[2].y = mInnerUV.yMin;
mTempUVs[1].y = mInnerUV.yMax;
mTempUVs[0].y = mOuterUV.yMax;
}
else
{
mTempPos[1].y = mTempPos[0].y + br.y;
mTempPos[2].y = mTempPos[3].y - br.w;
mTempUVs[0].y = mOuterUV.yMin;
mTempUVs[1].y = mInnerUV.yMin;
mTempUVs[2].y = mInnerUV.yMax;
mTempUVs[3].y = mOuterUV.yMax;
}
for (int x = 0; x < 3; ++x)
{
int x2 = x + 1;
for (int y = 0; y < 3; ++y)
{
if (centerType == AdvancedType.Invisible && x == 1 && y == 1) continue;
int y2 = y + 1;
if (x == 1 && y == 1) // Center
{
if (centerType == AdvancedType.Tiled)
{
float startPositionX = mTempPos[x].x;
float endPositionX = mTempPos[x2].x;
float startPositionY = mTempPos[y].y;
float endPositionY = mTempPos[y2].y;
float textureStartX = mTempUVs[x].x;
float textureStartY = mTempUVs[y].y;
float tileStartY = startPositionY;
while (tileStartY < endPositionY)
{
float tileStartX = startPositionX;
float textureEndY = mTempUVs[y2].y;
float tileEndY = tileStartY + tileSize.y;
if (tileEndY > endPositionY)
{
textureEndY = Mathf.Lerp(textureStartY, textureEndY, (endPositionY - tileStartY) / tileSize.y);
tileEndY = endPositionY;
}
while (tileStartX < endPositionX)
{
float tileEndX = tileStartX + tileSize.x;
float textureEndX = mTempUVs[x2].x;
if (tileEndX > endPositionX)
{
textureEndX = Mathf.Lerp(textureStartX, textureEndX, (endPositionX - tileStartX) / tileSize.x);
tileEndX = endPositionX;
}
Fill(verts, uvs, cols,
tileStartX, tileEndX,
tileStartY, tileEndY,
textureStartX, textureEndX,
textureStartY, textureEndY, c);
tileStartX += tileSize.x;
}
tileStartY += tileSize.y;
}
}
else if (centerType == AdvancedType.Sliced)
{
Fill(verts, uvs, cols,
mTempPos[x].x, mTempPos[x2].x,
mTempPos[y].y, mTempPos[y2].y,
mTempUVs[x].x, mTempUVs[x2].x,
mTempUVs[y].y, mTempUVs[y2].y, c);
}
}
else if (x == 1) // Top or bottom
{
if ((y == 0 && bottomType == AdvancedType.Tiled) || (y == 2 && topType == AdvancedType.Tiled))
{
float startPositionX = mTempPos[x].x;
float endPositionX = mTempPos[x2].x;
float startPositionY = mTempPos[y].y;
float endPositionY = mTempPos[y2].y;
float textureStartX = mTempUVs[x].x;
float textureStartY = mTempUVs[y].y;
float textureEndY = mTempUVs[y2].y;
float tileStartX = startPositionX;
while (tileStartX < endPositionX)
{
float tileEndX = tileStartX + tileSize.x;
float textureEndX = mTempUVs[x2].x;
if (tileEndX > endPositionX)
{
textureEndX = Mathf.Lerp(textureStartX, textureEndX, (endPositionX - tileStartX) / tileSize.x);
tileEndX = endPositionX;
}
Fill(verts, uvs, cols,
tileStartX, tileEndX,
startPositionY, endPositionY,
textureStartX, textureEndX,
textureStartY, textureEndY, c);
tileStartX += tileSize.x;
}
}
else if ((y == 0 && bottomType != AdvancedType.Invisible) || (y == 2 && topType != AdvancedType.Invisible))
{
Fill(verts, uvs, cols,
mTempPos[x].x, mTempPos[x2].x,
mTempPos[y].y, mTempPos[y2].y,
mTempUVs[x].x, mTempUVs[x2].x,
mTempUVs[y].y, mTempUVs[y2].y, c);
}
}
else if (y == 1) // Left or right
{
if ((x == 0 && leftType == AdvancedType.Tiled) || (x == 2 && rightType == AdvancedType.Tiled))
{
float startPositionX = mTempPos[x].x;
float endPositionX = mTempPos[x2].x;
float startPositionY = mTempPos[y].y;
float endPositionY = mTempPos[y2].y;
float textureStartX = mTempUVs[x].x;
float textureEndX = mTempUVs[x2].x;
float textureStartY = mTempUVs[y].y;
float tileStartY = startPositionY;
while (tileStartY < endPositionY)
{
float textureEndY = mTempUVs[y2].y;
float tileEndY = tileStartY + tileSize.y;
if (tileEndY > endPositionY)
{
textureEndY = Mathf.Lerp(textureStartY, textureEndY, (endPositionY - tileStartY) / tileSize.y);
tileEndY = endPositionY;
}
Fill(verts, uvs, cols,
startPositionX, endPositionX,
tileStartY, tileEndY,
textureStartX, textureEndX,
textureStartY, textureEndY, c);
tileStartY += tileSize.y;
}
}
else if ((x == 0 && leftType != AdvancedType.Invisible) || (x == 2 && rightType != AdvancedType.Invisible))
{
Fill(verts, uvs, cols,
mTempPos[x].x, mTempPos[x2].x,
mTempPos[y].y, mTempPos[y2].y,
mTempUVs[x].x, mTempUVs[x2].x,
mTempUVs[y].y, mTempUVs[y2].y, c);
}
}
else // Corner
{
if ((y == 0 && bottomType != AdvancedType.Invisible) || (y == 2 && topType != AdvancedType.Invisible) ||
(x == 0 && leftType != AdvancedType.Invisible) || (x == 2 && rightType != AdvancedType.Invisible))
{
Fill(verts, uvs, cols,
mTempPos[x].x, mTempPos[x2].x,
mTempPos[y].y, mTempPos[y2].y,
mTempUVs[x].x, mTempUVs[x2].x,
mTempUVs[y].y, mTempUVs[y2].y, c);
}
}
}
}
}
3. UISprite
3.1 UISprite是和圖集UIAtlas搭配使用的。通過指定圖集atlas和圖集里面圖片名稱spriteName，可以顯示對應一張圖片。通過UIAtlas.GetSprite方法得到UISpriteData，UISpriteData擁有Sprite的信息:name （名稱），x,y（在圖集紋理貼圖對應Sprite起始坐標-左上角），大小，border和padding。
public class UISpriteData
{
public string name = "Sprite";
public int x = 0;
public int y = 0;
public int width = 0;
public int height = 0;
public int borderLeft = 0;
public int borderRight = 0;
public int borderTop = 0;
public int borderBottom = 0;
public int paddingLeft = 0;
public int paddingRight = 0;
public int paddingTop = 0;
public int paddingBottom = 0;
}
3.2 核心方法OnFill
通過UIAtlas.GetSprite接口得到對應SpriteData，以此計算得到Sprite外矩形和內邊距的紋理信息
調用Fill方法填充幾何信息
public override void OnFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Texture tex = mainTexture;
if (tex == null) return;
if (mSprite == null) mSprite = atlas.GetSprite(spriteName);
if (mSprite == null) return;
Rect outer = new Rect(mSprite.x, mSprite.y, mSprite.width, mSprite.height);
Rect inner = new Rect(mSprite.x + mSprite.borderLeft, mSprite.y + mSprite.borderTop,
mSprite.width - mSprite.borderLeft - mSprite.borderRight,
mSprite.height - mSprite.borderBottom - mSprite.borderTop);
outer = NGUIMath.ConvertToTexCoords(outer, tex.width, tex.height);
inner = NGUIMath.ConvertToTexCoords(inner, tex.width, tex.height);
int offset = verts.size;
Fill(verts, uvs, cols, outer, inner);
if (onPostFill != null)
onPostFill(this, offset, verts, uvs, cols);
}
4. UITexture
4.1 屬性
mainTexture:紋理貼圖
material:制定材質
shader:如果material非空則使用material對應的shader，默認使用“Unlit/Transparent Colored“的shader
uvRect:指定紋理信息：x,y, width,height；其中x,y 為紋理的起始坐標，width,height為其顯示的紋理大小。
fixedAspect:
4.2 核心方法OnFill
通過mRect（uvRect）和mainTexture計算外矩形紋理信息
加上border得到內矩形紋理信息
調用Fill函數(shù)填充幾何信息
public override void OnFill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols)
{
Texture tex = mainTexture;
if (tex == null) return;
Rect outer = new Rect(mRect.x * tex.width, mRect.y * tex.height, tex.width * mRect.width, tex.height * mRect.height);
Rect inner = outer;
Vector4 br = border;
inner.xMin += br.x;
inner.yMin += br.y;
inner.xMax -= br.z;
inner.yMax -= br.w;
float w = 1f / tex.width;
float h = 1f / tex.height;
outer.xMin *= w;
outer.xMax *= w;
outer.yMin *= h;
outer.yMax *= h;
inner.xMin *= w;
inner.xMax *= w;
inner.yMin *= h;
inner.yMax *= h;
int offset = verts.size;
Fill(verts, uvs, cols, outer, inner);
if (onPostFill != null)
onPostFill(this, offset, verts, uvs, cols);
}
