spieleprogrammierer.de - Forum und Wiki zur Spieleprogrammierung und Spieleentwicklung

C-/C++-Quelltext

struct Vertex {
    float x, y, z;

    this(float x, float y, float z = 0.0) {
        this.x = x;
        this.y = y;
        this.z = z;
    }
}

struct TexCoords {
    float tx, ty;

    this(float tx, float ty) {
        this.tx = tx;
        this.ty = ty;
    }
}

// ...

Vertex[] buffer;
buffer ~= Vertex(100, 100);
buffer ~= Vertex(200, 100);
buffer ~= Vertex(200, 200);
buffer ~= Vertex(100, 200);

TexCoords[] texbuffer;
texbuffer ~= TexCoords(0, 0);
texbuffer ~= TexCoords(0.2, 0);
texbuffer ~= TexCoords(0.2, 0.2);
texbuffer ~= TexCoords(0, 0.2);

GLuint vboId;
glGenBuffers(1, &vboId);

// ...

if (!set) {
    writeln("set buffer data!");
    set = true;

    glBindBuffer(GL_ARRAY_BUFFER, vboId);

    glBufferData(GL_ARRAY_BUFFER, buffer.length * Vertex.sizeof, null, GL_STATIC_DRAW);
    auto vPtr = cast(Vertex*) glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
    for (uint i = 0; i < buffer.length; ++i) {
        vPtr[i].x = buffer[i].x;
        vPtr[i].y = buffer[i].y;
    }

    glUnmapBuffer(GL_ARRAY_BUFFER);

    glTexCoordPointer(2, GL_FLOAT, 0, &texbuffer[0].tx);
} else {
    glBindBuffer(GL_ARRAY_BUFFER, vboId);

    //glInterleavedArrays(GL_V3F, 0, null);

    tex3.bind();

    glInterleavedArrays(GL_T2F_V3F, 0, null);
    glDrawArrays(GL_QUADS, 0, buffer.length);
}