これは大学での私の最初のグラフィック科目であり、実装の一部が機能していません。関節を適切に描画することはできますが、関節の間に「骨」を入れる関数を書こうとしています。この時点では、骨は四角柱に変換された単なる立方体ですが、後でブレンダーなどから適切なモデルを導入しようとします。
私の悩みはローテーションです。約 5 時間後、私のパートナーと私はそれが機能するようになりましたが、腕や脚を動かすとすぐに、立方体がゆがみ、奇妙に見えます. どんな助けでも大歓迎です。以下は、ボーンを描画しようとする関数です。
private void DrawBone(Skeleton skeleton, JointType jointType0, JointType jointType1)
{
Joint joint0 = skeleton.Joints[jointType0];
Joint joint1 = skeleton.Joints[jointType1];
// If we can't find either of these joints, exit
if (joint0.TrackingState == JointTrackingState.NotTracked ||
joint1.TrackingState == JointTrackingState.NotTracked)
{
return;
}
// Don't draw if both points are inferred
if (joint0.TrackingState == JointTrackingState.Inferred &&
joint1.TrackingState == JointTrackingState.Inferred)
{
return;
}
// We assume all drawn bones are inferred unless BOTH joints are tracked
if (joint0.TrackingState == JointTrackingState.Tracked && joint1.TrackingState == JointTrackingState.Tracked)
//jointvector(joint) takes a joint and returns a Vector2 with its position data, with the z invtred to work properly with directx11
Vector3 bonevector = Vector3.Subtract(jointVector(joint0), jointVector(joint1));
//cubevector is supposed to describe the initial vector of a cube centred at (0,0,0) with a side length of 2. A fair amount of guesswork has gone into this bit.
Vector3 cubevector = new Vector3(0, 2, 0);
//midpoint of two joints
Vector3 transTest = Vector3.Divide(Vector3.Add(jointVector(joint0),jointVector(joint1)), 2);
//divide by two because our original cube has side length 2
float scaleFactor = Math.Abs(bonevector.Length() / cubevector.Length());
//we haven't been taught quaternions in class or anything, but after a fair while searching for similar problems they seemed like the go-to option for rotations.
world = Matrix.Transformation(new Vector3(0, 0, 0), new Quaternion(0), new Vector3(0.05f, scaleFactor, 0.05f), new Vector3(0, 0, 0), new Quaternion(Vector3.Cross(cubevector, bonevector), (float)Math.Acos(Vector3.Dot(bonevector, cubevector))), transTest);
//view and proj are defined elsewhere and are working fine, it's just the world that is being lame
worldViewProj = world * view * proj;
worldViewProj.Transpose();
sDXdata.context.UpdateSubresource(ref worldViewProj, sDXdata.constantBuffer);
//36 vertices of the cube (two triangles per face) defined elsewhere
sDXdata.context.Draw(36, 0);
return;