Question

我的OpenGL存在很大问题。我试图用一个简单的框来渲染纹理。但是，即使这个代码，它应该只是绘制框崩溃。如何使用VBO将纹理添加到3D框中？如何使此代码不崩溃？

class Box {
Location start, end;

......  More Code Here .....

public Location[] getVertices() {
    return new Location[] {
        start,                                   new Location(start).add(width, 0, 0),
        new Location(start).add(0, 0, depth),    new Location(start).add(width, 0, depth),
        end,                                     new Location(end).subtract(width, 0, 0),
        new Location(end).subtract(0, 0, depth), new Location(end).subtract(width, 0, depth)
    };
}

public void draw() {
    Location[] vertices = getVertices();
    FloatBuffer verts = BufferUtils.createFloatBuffer(vertices.length * 3);
    for(Location l : vertices) {
        verts.put(l.toArray());
    }

    int vertHandle = glGenBuffers();

    glBindBuffer(GL_ARRAY_BUFFER, vertHandle);
    glBufferData(GL_ARRAY_BUFFER, verts, GL_STATIC_DRAW);

    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 3, GL_FLOAT, false, 0, 0);
    glDrawArrays(GL_QUADS, 0, 4);
    glDisableVertexAttribArray(0);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
}
}

修改这是位置等级。

public class Location {

public float x, y, z;

//.......... Code here.......

public Location(Location l) {
    this.x = l.x;
    this.y = l.y;
    this.z = l.z;
}

public Location(float x, float y, float z) {
    this.x = x;
    this.y = y;
    this.z = z;
}

//... Code here.......

// Sets
public Location add(Location l) {
    this.x += l.x;
    this.y += l.y;
    this.z += l.z;
    return this;
}

public Location add(float x, float y, float z) {
    this.x += x;
    this.y += y;
    this.z += z;
    return this;
}

// Sets
public Location subtract(Location l) {
    this.x -= l.x;
    this.y -= l.y;
    this.z -= l.z;
    return this;
}

public Location subtract(float x, float y, float z) {
    this.x -= x;
    this.y -= y;
    this.z -= z;
    return this;
}

//..Code Here.....
public float[] toArray() {
    return new float[] {
        x, y, z
    };
}

//... Code Here....
}

编辑：这是我的initGL（）方法：

void initGL() {
    // Initialize OpenGL
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glViewport(0, 0, Display.getWidth(), Display.getHeight());

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    // Enable Depth Testing
    glEnable(GL_DEPTH_TEST);

    // Enable client states
    //glEnableClientState(GL_VERTEX_ARRAY); Do I need this???
    //glEnableClientState(GL_COLOR_ARRAY);

    // Are these right for drawing textures?
    glEnable(GL_TEXTURE_2D);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

    // enable alpha blending
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

}

这是我的renderGL（）方法：

public void renderGL() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer

    for(Box b : boxes) {
        b.draw();
    }

    //System.out.println(player.midpoint());
    Display.update();

    // Camera stuff. This has been working and so I don't think it's causing an issue
    glLoadIdentity();
    player.lookThrough();

}

修改这就是我为堆栈跟踪做的一切：

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000013b5cda0, pid=5844, tid=5824
#
# JRE version: 7.0_11-b21
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.6-b04 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C  [ig75icd64.dll+0x7cda0]  RegisterProcTableCallback+0x74cd0
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:\Users\Christian\Documents\JM3\BasicGame\hs_err_pid5844.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Java Result: 1

Answer 1

您需要在渲染多维数据集之前绑定纹理。此外，除了verts浮动缓冲区，您还需要一个存储纹理坐标（0到1）。对于纹理co-ords来说，你做了很多令人兴奋的事情，你用glVertexAttribPointer代替glTexCoordAttribPointer（只要你vertex替换texCoord几乎）。

使用VBO使用LWJGL纹理3D立方体

1 个答案: