Ejemplo n.º 1
0
 public Matrix4f SetToLookAt(Vector3f pos, Vector3f target, Vector3f up)
 {
     this.SetToIdentity();
     tempVec.Set(target);
     tempVec.SubtractStore(pos);
     tempVec2.Set(pos);
     tempVec2.MultiplyStore(-1);
     tmpMat.SetToTranslation(tempVec2);
     tmpMat2.SetToLookAt(tempVec, up);
     this.Set(tmpMat);
     this.MultiplyStore(tmpMat2);
     return(this);
 }
Ejemplo n.º 2
0
        public static void CalculateTangents(List<Vertex> vertices, List<int> indices)
        {
            for (int i = 0; i < indices.Count; i += 3)
            {
                try
                {
                    Vertex v0 = vertices[indices[i]];
                    Vertex v1 = vertices[indices[i + 1]];
                    Vertex v2 = vertices[indices[i + 2]];

                    Vector2f uv0 = v0.GetTexCoord0();
                    Vector2f uv1 = v1.GetTexCoord0();
                    Vector2f uv2 = v2.GetTexCoord0();

                    Vector3f edge1 = v1.GetPosition().Subtract(v0.GetPosition());
                    Vector3f edge2 = v2.GetPosition().Subtract(v0.GetPosition());

                    Vector2f edge1uv = uv1.Subtract(uv0);
                    Vector2f edge2uv = uv2.Subtract(uv0);

                    float cp = edge1uv.y * edge2uv.x - edge1uv.x * edge2uv.y;
                    if (cp != 0.0f)
                    {
                        float mul = 1.0f / cp;
                        Vector3f tangent = new Vector3f().Set(edge1.Multiply(-edge2uv.y).AddStore(edge2.Multiply(edge1uv.y)));
                        tangent.MultiplyStore(mul);
                        Vector3f bitangent = new Vector3f().Set(edge1.Multiply(-edge2uv.x).AddStore(edge2.Multiply(edge1uv.x)));
                        bitangent.MultiplyStore(mul);

                        tangent.NormalizeStore();
                        bitangent.NormalizeStore();

                        v0.SetTangent(tangent);
                        v1.SetTangent(tangent);
                        v2.SetTangent(tangent);

                        v0.SetBitangent(bitangent);
                        v1.SetBitangent(bitangent);
                        v2.SetBitangent(bitangent);
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex);
                }
            }
        }
Ejemplo n.º 3
0
        public Vector3f Unproject(float mouseX, float mouseY)
        {
            Vector3f vec = new Vector3f();

            vec.x = -2f * (mouseX / width);
            vec.y = 2f * (mouseY / height);
            vec.z = 0f;

            vec.MultiplyStore(projMatrix.Invert());
            vec.MultiplyStore(viewMatrix.Invert());

            vec.SubtractStore(Translation);

            return vec;
        }