Question

我有以下代码在lwjgl中初始化我的两个矩阵：

GL20.glUseProgram(shaderProgramID);
        Matrix4f camera = new Matrix4f();
        Matrix4f.translate(new Vector3f(0, 0, 0), camera, camera);
        FloatBuffer buffer = BufferUtils.createFloatBuffer(16);
        camera.store(buffer);
        buffer.flip();
        GL20.glUniformMatrix2(GL20.glGetUniformLocation(shaderProgramID, "camera"), false, buffer);
        GL20.glUseProgram(0);

        float near = 0.1f, far = 100.0f, top = 300, bottom = -300, left = -400, right = 400;  
        Matrix4f projection = new Matrix4f();
        projection.setIdentity();
        projection.m00 = 2*near/(right - left);
        projection.m11 = 2*near/(top - bottom);
        projection.m22 = -(far +near)/(far - near);
        projection.m23 = -1;
        projection.m32 = -2*far*near/(far - near);
        projection.m20 = (right+left)/(right -left);
        projection.m21 = (top + bottom)/(top-bottom);
        projection.m33 = 0;
        FloatBuffer buffer2 = BufferUtils.createFloatBuffer(16);
        projection.store(buffer2);
        buffer.flip();
        GL20.glUniformMatrix2(GL20.glGetUniformLocation(shaderProgramID, "projection"), false, buffer);
        GL20.glUseProgram(0);

顶点着色器执行以下操作：

gl_Position = projection * camera * vec4(vert, 1);

我不知道它有什么问题......任何人都有想法？

Answer 1

我知道这已经很晚了，但是为了完整起见：

上面的代码在调用glUseProgram（0）：时没有保留任何程序，因此稍后调用glUniform *会创建一个GL_INVALID_OPERATION，因为没有程序对象存在。这也意味着实际上从未为您的程序设置投影，因此在渲染时它是一个空矩阵，它与矩阵相乘，矢量仍然会产生空矢量。

此外，您可以考虑在加载着色器后保存一次均匀位置，并检查它是否确实可用。

Opengl相机投影 Coord =无

1 个答案:

Opengl相机*投影* Coord =无

1 个答案:

Opengl相机投影 Coord =无