[게임엔진활용] 3강 Geometry, Texture, String

1. 더블 버퍼링, 해상도 (RenderView.cs => MainCamera.cs setViewport)

지난 시간 이어 설명 ...

 

2. OnGUI

    void OnGUI()
    {
        if( Event.current.type != EventType.Repaint )
            return;
 
        RenderTexture texBack = RenderTexture.active;
        RenderTexture.active = mc.rt;
        Matrix4x4 matBack = GUI.matrix;
        GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, Vector3.one);
 
        // draw something ...
 
        RenderTexture.active = texBack;
        GUI.matrix = matBack;
        GL.Clear(true, true, Color.black);
        GUI.matrix = Matrix4x4.TRS(
            new Vector3(mc.viewport.x, mc.viewport.y, 0),
            Quaternion.identity,
            new Vector3((float)(Screen.width - mc.viewport.x * 2) / mc.devWidth,
                        (float)(Screen.height - mc.viewport.y * 2) / mc.devHeight, 1.0f));
        drawImage(mc.rt, 0, 0, 0);
 
    }
 

 

3. Texture

    public const int TOP = 1, BOTTOM = 2, VCENTER = 4,
                        LEFT = 8, RIGHT = 16, HCENTER = 32;
    public const int REVERSE_NONE = 0, REVERSE_WIDTH = 1, REVERSE_HEIGHT = 2;
 
    Texture createImage(string path)
    {
        return Resources.Load<Texture>(path);
    }
 
    void drawImage(Texture tex, float x, float y, int anc = TOP | LEFT )
    {
        drawImage(tex, x, y, 0, 0, tex.width, tex.height, anc, 1.0f, 1.0f, 2, 0, REVERSE_NONE);
    }
 
    void drawImage(Texture tex, float x, float y,
        float tx, float ty, float tw, float th, int anc = TOP | LEFT,
        float rx = 1f, float ry = 1f, int xyz = 2, float degree = 0f, int reverse = REVERSE_NONE)
    {
        int w = (int)(tw * rx);
        int h = (int)(th * ry);
 
        switch(anc)
        {
            case TOP | LEFT:                                 break;
            case TOP | RIGHT:        x -= w;                break;
            case TOP | HCENTER:      x -= w / 2;          break;
            case BOTTOM | LEFT:                  y -= h;  break;
            case BOTTOM | RIGHT:     x -= w;     y -= h;  break;
            case BOTTOM | HCENTER:   x -= w / 2; y -= h;   break;
            case VCENTER | LEFT:                 y -= h / 2; break;
            case VCENTER | RIGHT:    x -= w;     y -= h / 2; break;
            case VCENTER | HCENTER:  x -= w / 2; y -= h / 2; break;
        }
 
        Matrix4x4 matrixPrjection = GUI.matrix;
 
        Matrix4x4 matrixModelview = Matrix4x4.TRS(
            new Vector3(x + w / 2, y + h / 2, 0),
            Quaternion.Euler(xyz == 0 ? degree : 0,
                            xyz == 1 ? degree : 0,
                            xyz == 2 ? degree : 0),
            Vector3.one);
        GUI.matrix = GUI.matrix * matrixModelview;
 
        if ((reverse & REVERSE_WIDTH) == REVERSE_WIDTH)
        {
            Matrix4x4 m0 = Matrix4x4.TRS(
                new Vector3(0, 0, 0),
                Quaternion.Euler(0, 180, 0),
                new Vector3(1, 1, 1)
                );
            GUI.matrix = GUI.matrix * m0;
        }
        else if ((reverse & REVERSE_HEIGHT) == REVERSE_HEIGHT)
        {
            Matrix4x4 m1 = Matrix4x4.TRS(
                new Vector3(0, 0, 0),
                Quaternion.Euler(180, 0, 0),
                new Vector3(1, 1, 1)
                );
            GUI.matrix = GUI.matrix * m1;
        }
 
        Material m = material[0];
        m.SetColor("_BaseColor", Color.white);
        m.SetTexture("_BaseMap", tex);
 
        Graphics.DrawTexture(
            new Rect(-w / 2, -h / 2, w, h),
            tex,
            new Rect(tx / tex.width, ty / tex.height, tw / tex.width, th / tex.height),
            0, 0, 0, 0, m);
 
        GUI.matrix = matrixPrjection;
    }
 
 
 

 

 

알파 채널을 사용하기 위해, Shader에서 Blend를 설정

 

 

4. Line, Rect

Texture texDot;
Color color;
float lineWidth;
 
void init()
{
    Texture2D tex = new Texture2D(1, 1);
    tex.SetPixel(0, 0, Color.white);
    tex.Apply();
    texDot = tex;
}
 
public void setRGBA(float r, float g, float b, float a)
{
    color.r = r;
    color.g = g;
    color.b = b;
    color.a = a;
}
 
public void setLineWidth(float width)
{
    lineWidth = width;
}
 
public void drawLine(float sx, float sy, float ex, float ey)
{
    float cx = (sx + ex) / 2;
    float cy = (sy + ey) / 2;
    float dx = ex - sx;
    float dy = ey - sy;
    float len = Mathf.Sqrt(dx * dx + dy * dy);
 
    float degree = Mathf.Atan2(ey - sy, ex - sx) * Mathf.Rad2Deg;
    drawImage(texDot, cx, cy, 0, 0, 1, 1, VCENTER | HCENTER,
        len, lineWidth, 2, degree, REVERSE_NONE);
}
 
public void drawRect(float x, float y, float width, float height)
{
    // top & bottom
    drawLine(x, y, x + width, y);
    drawLine(x, y + height - lineWidth, 
             x + width, y + height - lineWidth);
    // left & right
    drawLine(x, y + lineWidth, x, y + height - lineWidth);
    drawLine(x + width - lineWidth, y + lineWidth, 
             x + width - lineWidth, y + height - lineWidth);
}
 
public void fillRect(float x, float y, float width, float height)
{
    drawImage(texDot, x, y, 0, 0, 1, 1, TOP | LEFT,
        width, height, 2, 0, REVERSE_NONE);
}

 

5. String

    string stringName = null;
    float stringSize = 20f;
    Color stringColor = Color.white;
 
    public string getStringName()
    {
        return stringName;
    }
    public void setStringName(string name)
    {
        stringName = name;
    }
 
    public float getStringSize()
    {
        return stringSize;
    }
    public void setStringSize(float size)
    {
        stringSize = size;
    }
 
    public Color getStringRGBA()
    {
        return stringColor;
    }
    public void setStringRGBA(float r, float g, float b, float a)
    {
        stringColor = new Color(r, g, b, a);
    }
 
    public Vector2 sizeOfString(string str)
    {
        GUIStyle style = new GUIStyle(GUI.skin.label);
        style.font = Resources.Load<Font>(stringName);
        style.fontSize = (int)stringSize;
        style.fontStyle = FontStyle.Normal;
        style.normal.textColor = stringColor;
        return style.CalcSize(new GUIContent(str));
    }
 
    public void drawString(string str, float x, float y, int anc = TOP | LEFT)
    {
        GUIStyle style = new GUIStyle(GUI.skin.label);
        style.font = Resources.Load<Font>(stringName);
        style.fontSize = (int)stringSize;
        style.fontStyle = FontStyle.Normal;
        style.normal.textColor = stringColor;
        style.hover.textColor = stringColor;
        Vector2 size = style.CalcSize(new GUIContent(str));
        switch (anc)
        {
            case TOP | LEFT:                                        break;
            case TOP | RIGHT:       x -= size.x;                    break;
            case TOP | HCENTER:     x -= size.x / 2;                break;
            case BOTTOM | LEFT:                     y -= size.y;    break;
            case BOTTOM | RIGHT:    x -= size.x;    y -= size.y;    break;
            case BOTTOM | HCENTER:  x -= size.x / 2;y -= size.y;    break;
            case VCENTER | LEFT:                    y -= size.y / 2;break;
            case VCENTER | RIGHT:   x -= size.x;    y -= size.y / 2;break;
            case VCENTER | HCENTER: x -= size.x / 2;y -= size.y / 2;break;
        }
        GUI.color = stringColor;// #issue
        GUI.Label(new Rect(x, y, size.x, size.y), str, style);
    }