我正在为游戏引擎的地图编辑器开发基本 GUI。一切正常，除了程序仅将一些四边形着色为我想要的颜色（灰色），并将其他一些四边形着色为黑色，我不知道为什么。这是问题的图片。所有的四边形按钮都应该是灰色的，但事实并非如此。
这是我绘制它们的代码。
import static org.lwjgl.opengl.GL11.*;
import java.awt.Font;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.EventListener;
import java.util.EventObject;
import java.util.List;
import org.newdawn.slick.Color;
import org.newdawn.slick.geom.Vector2f;
import org.newdawn.slick.opengl.Texture;
public class MapEditorUI
{
private int cols;
private float dHeight, dWidth, bHeight, bWidth;
private Color backgroundColor;
private Vector2f startPos;
private Vector2f borderStartPos;
private GUI editorGUI = new GUI();
public GUI.Element clickedElement;
MapEditorUI()
{
//int width = 70, xStart = 800, yStart = 330, height = 20;
editorGUI.addElement(0, new Vector2f(910, 330), new Vector2f(1020, 350), "Fill Layer");
editorGUI.addElement(0, new Vector2f(910, 360), new Vector2f(1020, 380), "Clear Layer");
editorGUI.addElement(0, new Vector2f(800, 330), new Vector2f(870, 350), "Ground");
editorGUI.addElement(0, new Vector2f(800, 360), new Vector2f(870, 380), "Mask");
editorGUI.addElement(0, new Vector2f(800, 390), new Vector2f(870, 410), "Mask2");
editorGUI.addElement(0, new Vector2f(800, 420), new Vector2f(870, 440), "Fringe");
editorGUI.addElement(0, new Vector2f(800, 450), new Vector2f(880, 470), "Fringe2");
}
public void initUI(int cols, Color color)
{
this.cols = cols;
this.backgroundColor = color;
}
public void setLoc(float startX, float startY, float width, float height)
{ startPos = new Vector2f(startX, startY); dHeight = height; dWidth = width; }
public void setBorderLocs(float borderStartX, float borderStartY, float width, float height)
{ borderStartPos = new Vector2f(borderStartX, borderStartY); bWidth = width; bHeight = height; }
public void draw()
{
glDisable(GL_TEXTURE_2D);
drawBackground();
drawBorder();
editorGUI.draw();
}
public boolean checkMouseInUI(float x, float y)
{
if(x > startPos.x && y > startPos.y)
return true;
else if(x < borderStartPos.x && x > borderStartPos.x + bWidth)
return true;
return false;
}
public int doMouseActions(float x, float y)
{
clickedElement = editorGUI.checkClick(x, y);
if(clickedElement != null) // Something was actually clicked
{
// System.out.println("CLICKED: " + clickedElement.text);
return 0; // Element Clicked, have main class handle it from there
}
return -1;
}
private void drawBorder()
{
backgroundColor.bind();
glBegin(GL_QUADS);
glVertex2f(borderStartPos.x, borderStartPos.y);
glVertex2f(borderStartPos.x + bWidth, borderStartPos.y);
glVertex2f(borderStartPos.x + bWidth, borderStartPos.y + bHeight);
glVertex2f(borderStartPos.x, borderStartPos.y + bHeight);
glEnd();
}
private void drawBackground()
{
backgroundColor.bind();
glBegin(GL_QUADS);
glVertex2f(startPos.x, startPos.y);
glVertex2f(startPos.x + dWidth, startPos.y);
glVertex2f(startPos.x + dWidth, startPos.y + dHeight);
glVertex2f(startPos.x, startPos.y + dHeight);
glEnd();
}
class GUI
{
private Text guiText = new Text();
private List<Element> Elements = new ArrayList<Element>();
GUI()
{
guiText.init("Courier", Font.PLAIN, 16);
}
public Element checkClick(float x, float y)
{
for(Element i : Elements)
{
if(i != null)
{
if(i.checkClick(x, y) == true)
{
i.clicked();
return i;
}
}
}
return null;
}
public void draw()
{
for(Element i : Elements)
{
if(i != null)
i.draw();
}
}
public void addElement(int type, Vector2f startPos, Vector2f endPos, String text)
{Elements.add(new Element(type, startPos, endPos, text));}
public void addElement(int type, Vector2f startPos, Vector2f endPos, String text, Color buttonBackgroundColor)
{Elements.add(new Element(type, startPos, endPos, text, buttonBackgroundColor));}
class Element
{
public int type;
private Vector2f startPos, endPos;
public String text;
private byte state;
private long timeClick;
private Color buttonColor;
Element(int type, Vector2f startPos, Vector2f endPos, String text)
{this.type = type; this.startPos = startPos; this.endPos = endPos; this.text = text;}
Element(int type, Vector2f startPos, Vector2f endPos, String text, Color buttonColor)
{this.type = type; this.startPos = startPos; this.endPos = endPos; this.text = text; this.buttonColor = buttonColor;}
public void draw()
{
checkTime();
switch(type)
{
case 0: // Button
switch(state)
{
case 0: // Unclicked
// if(buttonColor != null)
// buttonColor.bind();
// else
Color.gray.bind();
break;
case 1: // Clicked
// if(buttonColor != null)
// new Color(buttonColor.r-50, buttonColor.g-50, buttonColor.b-50).bind();
// else
Color.red.bind();
break;
}
// Color.green.bind();
// System.out.println(glGetFloat(GL_CURRENT_COLOR)[2]);
float Minv[]=new float[16];
ByteBuffer temp = ByteBuffer.allocateDirect(64);
temp.order(ByteOrder.nativeOrder());
glGetFloat(GL_MODELVIEW_MATRIX, (FloatBuffer)temp.asFloatBuffer());
temp.asFloatBuffer().get(Minv);
for(int i = 0; i < 16; ++i)
System.out.println(text + "| " + i + ": " + Minv[i]);
glBegin(GL_QUADS);
glVertex2f(startPos.x, startPos.y);
glVertex2f(endPos.x, startPos.y);
glVertex2f(endPos.x, endPos.y);
glVertex2f(startPos.x, endPos.y);
glEnd();
guiText.drawString(startPos.x + 2, startPos.y - 2, text, Color.white);
glDisable(GL_BLEND);
break;
}
}
private void checkTime()
{
long curTime = System.currentTimeMillis();
long timePassed = curTime - timeClick;
if(timePassed > 50)
state = 0;
}
public boolean checkClick(float x, float y)
{
if((x > startPos.x && y > startPos.y) && (x < endPos.x && y < endPos.y))
{
return true;
}
return false;
}
public void clicked()
{
timeClick = System.currentTimeMillis();
state = 1; // Clicked
}
public void setType(int type)
{this.type = type;}
public void setButtonColor(Color buttonColor)
{this.buttonColor = buttonColor;}
}
}
}
这是我的drawString代码：
public void drawString(float x, float y, String text, Color color)
{
// Make sure alpha blending is enabled, it might not be
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
font.drawString(x, y, text, color);
}