Question

您好我是LWJGL的新手，我需要帮助在屏幕上绘制项目。当我渲染我的2D图块时，我的问题是我的背景颜色更改为图块颜色的颜色。因此，例如，如果我制作绿色瓷砖，背景也会变绿！这是我的代码：

MainClass：

    public class Mian {

    public static void main(String[] args) throws Exception {
        Display.setDisplayMode(new DisplayMode(640, 480));
        Display.create();

        while (!Display.isCloseRequested()) {

            setCamera();
            drawBackground();
            createLevel();
            Display.update();
            Display.sync(60);

        }
        Display.destroy();

    }

    public static void setCamera() {
        glClear(GL_COLOR_BUFFER_BIT);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(0, 640, 0, 480, -1, 1);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
    }

    public static void drawBackground(){
        glBegin(GL_QUADS);

        glColor3d(0.6, 0.7, 1);
        glVertex2d(0, 0);
        glVertex2d(640, 0);

        glColor3d(0.3, 0.5, 1);
        glVertex2d(640, 480);
        glVertex2d(0, 480);

        glEnd();
    }

    public static void createLevel(){
        List<Tile> tileList = new ArrayList<Tile>();
        tileList.add(new Tile(0,0,"res/GrassTile"));
        tileList.add(new Tile(32,0,"res/GrassTile"));
        tileList.add(new Tile(64,0,"res/GrassTile"));
        tileList.add(new Tile(96,0,"res/GrassTile"));
        tileList.add(new Tile(128,0,"res/GrassTile"));
        tileList.add(new Tile(160,0,"res/GrassTile"));
        tileList.add(new Tile(192,0,"res/GrassTile"));
        tileList.add(new Tile(224,0,"res/GrassTile"));
        tileList.add(new Tile(256,0,"res/GrassTile"));
        tileList.add(new Tile(288,0,"res/GrassTile"));
        tileList.add(new Tile(320,0,"res/GrassTile"));
        tileList.add(new Tile(352,0,"res/GrassTile"));
        tileList.add(new Tile(384,0,"res/GrassTile"));
        tileList.add(new Tile(416,0,"res/GrassTile"));
        tileList.add(new Tile(448,0,"res/GrassTile"));
        tileList.add(new Tile(480,0,"res/GrassTile"));
        tileList.add(new Tile(512,0,"res/GrassTile"));
        tileList.add(new Tile(544,0,"res/GrassTile"));
        tileList.add(new Tile(576,0,"res/GrassTile"));
        tileList.add(new Tile(608,0,"res/GrassTile"));


    }

}

瓷砖类：

package Entitites;

import java.io.IOException;

import org.lwjgl.opengl.GL11;
import org.newdawn.slick.Color;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;
import org.newdawn.slick.util.ResourceLoader;

public class Tile {
    public static int x;
    public static int y;
    public static Texture texture;

    public Tile(int tileX, int tileY, String path) {
        x = tileX;
        y = tileY;
        try {
            texture = TextureLoader.getTexture("PNG",
                    ResourceLoader.getResourceAsStream(path + ".png"));
        } catch (IOException e) {
            System.out.println("Error loading a tile texture! X:" + x + " - Y:"
                    + y);
            e.printStackTrace();
        }
        drawTile();
    }

    public static void drawTile() {

        Color.white.bind();
        texture.bind();

        GL11.glPushMatrix();
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glTranslated(x, y, 0);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glBegin(GL11.GL_QUADS);
        GL11.glTexCoord2f(0, 0);
        GL11.glVertex2f(1, 1);
        GL11.glTexCoord2f(1, 0);
        GL11.glVertex2f(1 + texture.getTextureWidth(), 0);
        GL11.glTexCoord2f(1, 1);
        GL11.glVertex2f(1 + texture.getTextureWidth(),
                1 + texture.getTextureHeight());
        GL11.glTexCoord2f(0, 1);
        GL11.glVertex2f(1, 1 + texture.getTextureHeight());

        GL11.glEnd();
        GL11.glDisable(GL11.GL_BLEND);
        GL11.glPopMatrix();
    }

}

我真的无法弄明白。任何帮助将不胜感激：）

Answer 1

您可以在drawTile()：

的开头启用纹理

GL11.glEnable(GL11.GL_TEXTURE_2D);

但永远不要再禁用它。这意味着下次调用displayBackground()时，背景也将使用您渲染的最后一个图块的纹理进行渲染。

要解决此问题，请在drawTile()：

的末尾添加此调用

GL11.glDisable(GL11.GL_TEXTURE_2D);

在OpenGL中渲染绿色瓷砖后，背景变为绿色

1 个答案: