/// <summary>
/// 创建一个立方体
/// </summary>
public void CreateCube()
{
// 顶点位置
Vector3D[] points =
{
new Vector3D(-1, 1, -1),
new Vector3D(-1, -1, -1),
new Vector3D(1, -1, -1),
new Vector3D(1, 1, -1),
new Vector3D(-1, 1, 1),
new Vector3D(-1, -1, 1),
new Vector3D(1, -1, 1),
new Vector3D(1, 1, 1)
};
// 顶点索引
int[] indices =
{
// 前面
0, 1, 2, 0, 2, 3,
// 后面
7, 6, 5, 7, 5, 4,
// 左面
0, 4, 5, 0, 5, 1,
// 右面
2, 6, 7, 2, 7, 3,
// 上面
3, 7, 4, 3, 4, 0,
// 下面
1, 5, 6, 1, 6, 2
};
// UV坐标
Vector2[] texcoords =
{
// 前面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0),
// 后面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0),
// 左面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0),
// 右面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0),
// 上面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0),
// 下面
new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1),
new Vector2(0, 0), new Vector2(1, 1), new Vector2(1, 0)
};
//法线
Vector3D[] norlmas =
{
// 前面
new Vector3D(0, 0, -1), new Vector3D(0, 0, -1), new Vector3D(0, 0, -1),
new Vector3D(0, 0, -1), new Vector3D(0, 0, -1), new Vector3D(0, 0, -1),
// 后面
new Vector3D(0, 0, 1), new Vector3D(0, 0, 1), new Vector3D(0, 0, 1),
new Vector3D(0, 0, 1), new Vector3D(0, 0, 1), new Vector3D(0, 0, 1),
// 左面
new Vector3D(-1, 0, 0), new Vector3D(-1, 0, 0), new Vector3D(-1, 0, 0),
new Vector3D(-1, 0, 0), new Vector3D(-1, 0, 0), new Vector3D(-1, 0, 0),
// 右面
new Vector3D(1, 0, 0), new Vector3D(1, 0, 0), new Vector3D(1, 0, 0),
new Vector3D(1, 0, 0), new Vector3D(1, 0, 0), new Vector3D(1, 0, 0),
// 上面
new Vector3D(0, 1, 0), new Vector3D(0, 1, 0), new Vector3D(0, 1, 0),
new Vector3D(0, 1, 0), new Vector3D(0, 1, 0), new Vector3D(0, 1, 0),
// 下面
new Vector3D(0, -1, 0), new Vector3D(0, -1, 0), new Vector3D(0, -1, 0),
new Vector3D(0, -1, 0), new Vector3D(0, -1, 0), new Vector3D(0, -1, 0),
};
List <Vertex> vertices = new List <Vertex>();
for (int i = 0; i < 36; i++)
{
Vertex vertex = new Vertex();
Vector3D point = points[indices[i]];
vertex.Position = point;
vertex.Position.w = 1;
vertex.TexCoord = texcoords[i];
vertex.Normal = norlmas[i];
vertex.Color = new SampleCommon.Color((point.x + 1) / 2, (point.y + 1) / 2, (point.z + 1) / 2);
vertices.Add(vertex);
}
List <Triangle> triangles = new List <Triangle>();
for (int i = 0; i < 36; i += 3)
{
Triangle triangle = new Triangle(vertices[i], vertices[i + 1], vertices[i + 2]);
triangles.Add(triangle);
}
mCube = new Mesh(triangles);
mRenderer.AddRenderObject(mCube);
}
public override void Added()
{
_renderObject = new ImGuiRenderObject();
Renderer.AddRenderObject(_renderObject, RenderPass.UI);
}
