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OpenGL/OpenTKで初めて作業したときに、2つのオブジェクトをレンダリングしようとすると正しくレンダリングされません。私はコードを実験したが、何が起こっているのかわからない。私は、mVAO/mVBO配列を間違って使用しているという考えに固執しています。OpenGL/OpenTK - 複数のオブジェクトが期待どおりにレンダリングされない
The object on top of the cylinder is the one that isn't rendering properly
and this is how that object should look
第二の目的は、最初の1のように歪んで取得していないようだ、それは上に立つためだけシリンダー、です。
これは私のコードです：
private int[] mVBO_IDs = new int[4];
private int[] mVAO_IDs = new int[3];
private ShaderUtility mShader;
private ModelUtility mSphereModelUtility;
private ModelUtility mCylinderModelUtility;
private Matrix4 mView, mSphereModel, mGroundModel, mCylinderModel;
protected override void OnLoad(EventArgs e)
{
// Set some GL state
GL.ClearColor(Color4.LightBlue);
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.CullFace);
mShader = new ShaderUtility(@"Lab3/Shaders/vPassThrough.vert", @"Lab3/Shaders/fLighting.frag");
GL.UseProgram(mShader.ShaderProgramID);
int vPositionLocation = GL.GetAttribLocation(mShader.ShaderProgramID, "vPosition");
int vNormalLocation = GL.GetAttribLocation(mShader.ShaderProgramID, "vNormal");
GL.GenVertexArrays(mVAO_IDs.Length, mVAO_IDs);
GL.GenBuffers(mVBO_IDs.Length, mVBO_IDs);
float[] squareVertices = new float[] {-10, 0, -10,0,1,0,
-10, 0, 10,0,1,0,
10, 0, 10,0,1,0,
10, 0, -10,0,1,0,};
/// Floor
GL.BindVertexArray(mVAO_IDs[0]);
GL.BindBuffer(BufferTarget.ArrayBuffer, mVBO_IDs[0]);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(squareVertices.Length * sizeof(float)), squareVertices, BufferUsageHint.StaticDraw);
int size;
GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, out size);
if (squareVertices.Length * sizeof(float) != size)
{
throw new ApplicationException("Vertex data not loaded onto graphics card correctly");
}
GL.EnableVertexAttribArray(vPositionLocation);
GL.VertexAttribPointer(vPositionLocation, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), 0);
GL.EnableVertexAttribArray(vNormalLocation);
GL.VertexAttribPointer(vNormalLocation, 3, VertexAttribPointerType.Float, true, 6 * sizeof(float), 3);
/// Model 1
mSphereModelUtility = ModelUtility.LoadModel(@"Utility/Models/model.bin");
GL.BindVertexArray(mVAO_IDs[1]);
GL.BindBuffer(BufferTarget.ArrayBuffer, mVBO_IDs[1]);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(mSphereModelUtility.squareVertices.Length * sizeof(float)), mSphereModelUtility.squareVertices, BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mVBO_IDs[2]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(mSphereModelUtility.Indices.Length * sizeof(float)), mSphereModelUtility.Indices, BufferUsageHint.StaticDraw);
GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, out size);
if (mSphereModelUtility.squareVertices.Length * sizeof(float) != size)
{
throw new ApplicationException("Vertex data not loaded onto graphics card correctly");
}
GL.GetBufferParameter(BufferTarget.ElementArrayBuffer, BufferParameterName.BufferSize, out size);
if (mSphereModelUtility.Indices.Length * sizeof(float) != size)
{
throw new ApplicationException("Index data not loaded onto graphics card correctly");
}
GL.EnableVertexAttribArray(vPositionLocation);
GL.VertexAttribPointer(vPositionLocation, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), 0);
GL.EnableVertexAttribArray(vNormalLocation);
GL.VertexAttribPointer(vNormalLocation, 3, VertexAttribPointerType.Float, true, 6 * sizeof(float), 0);
GL.BindVertexArray(0);
/// Model 2
mCylinderModelUtility = ModelUtility.LoadModel(@"Utility/Models/cylinder.bin");
GL.BindVertexArray(mVAO_IDs[2]);
GL.BindBuffer(BufferTarget.ArrayBuffer, mVBO_IDs[2]);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(mCylinderModelUtility.squareVertices.Length * sizeof(float)), mCylinderModelUtility.squareVertices, BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mVBO_IDs[3]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(mCylinderModelUtility.Indices.Length * sizeof(float)), mCylinderModelUtility.Indices, BufferUsageHint.StaticDraw);
GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, out size);
if (mCylinderModelUtility.squareVertices.Length * sizeof(float) != size)
{
throw new ApplicationException("Vertex data not loaded onto graphics card correctly");
}
GL.GetBufferParameter(BufferTarget.ElementArrayBuffer, BufferParameterName.BufferSize, out size);
if (mCylinderModelUtility.Indices.Length * sizeof(float) != size)
{
throw new ApplicationException("Index data not loaded onto graphics card correctly");
}
GL.EnableVertexAttribArray(vPositionLocation);
GL.VertexAttribPointer(vPositionLocation, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), 0);
GL.EnableVertexAttribArray(vNormalLocation);
GL.VertexAttribPointer(vNormalLocation, 3, VertexAttribPointerType.Float, true, 6 * sizeof(float), 0);
GL.BindVertexArray(0);
/// Positions
mView = Matrix4.CreateTranslation(0, -1.5f, 0);
int uView = GL.GetUniformLocation(mShader.ShaderProgramID, "uView");
GL.UniformMatrix4(uView, true, ref mView);
mGroundModel = Matrix4.CreateTranslation(0, 0, -5f);
mSphereModel = Matrix4.CreateTranslation(0, 3f, -5f);
mCylinderModel = Matrix4.CreateTranslation(0, 1f, -5f);
Vector3 t = mSphereModel.ExtractTranslation();
Matrix4 translation = Matrix4.CreateTranslation(t);
Matrix4 inverseTranslation = Matrix4.CreateTranslation(-t);
mSphereModel = mSphereModel * inverseTranslation * Matrix4.CreateRotationY((float)(Math.PI * -90/180.0)) *
translation;
t = mCylinderModel.ExtractTranslation();
translation = Matrix4.CreateTranslation(t);
inverseTranslation = Matrix4.CreateTranslation(-t);
mCylinderModel = mCylinderModel * inverseTranslation * Matrix4.CreateRotationY((float)(Math.PI * -90/180.0)) *
translation;
/// Lighting
int uLightPositionLocation = GL.GetUniformLocation(mShader.ShaderProgramID, "uLightPosition");
Vector4 lightPosition = Vector4.Transform(new Vector4(3, 5, -5f, 1), mView);
GL.Uniform4(uLightPositionLocation, lightPosition);
base.OnLoad(e);
}
protected override void OnRenderFrame(FrameEventArgs e)
{
base.OnRenderFrame(e);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
int uModel = GL.GetUniformLocation(mShader.ShaderProgramID, "uModel");
GL.UniformMatrix4(uModel, true, ref mGroundModel);
GL.BindVertexArray(mVAO_IDs[0]);
GL.DrawArrays(PrimitiveType.TriangleFan, 0, 4);
Matrix4 m = mSphereModel * mGroundModel;
uModel = GL.GetUniformLocation(mShader.ShaderProgramID, "uModel");
GL.UniformMatrix4(uModel, true, ref m);
GL.BindVertexArray(mVAO_IDs[1]);
GL.DrawElements(PrimitiveType.Triangles, mSphereModelUtility.Indices.Length, DrawElementsType.UnsignedInt, 0);
m = mCylinderModel * mGroundModel;
uModel = GL.GetUniformLocation(mShader.ShaderProgramID, "uModel");
GL.UniformMatrix4(uModel, true, ref m);
GL.BindVertexArray(mVAO_IDs[2]);
GL.DrawElements(PrimitiveType.Triangles, mCylinderModelUtility.Indices.Length, DrawElementsType.UnsignedInt, 0);
GL.BindVertexArray(0);
this.SwapBuffers();
}