private SceneNodeBase GetRootNode(ICamera modelCamera)
{
var root = new GroupNode();
// render 'scene' to franebuffer.
{
int width = this.winGLCanvas1.Width, height = this.winGLCanvas1.Height;
var rtt = new RenderToTexttureNode(width, height, modelCamera, new ColoredFramebufferProvider());
rtt.BackgroundColor = Color.SkyBlue;
{
var teapot = TeapotNode.Create();
teapot.RenderWireframe = false;
rtt.Children.Add(teapot);// rendered to framebuffer, then to texture.
}
root.Children.Add(rtt);
this.rtt = rtt;
}
{
var group = new GroupNode();
// display 'scene' in rectangle.
{
var node = RectangleNode.Create();
node.TextureSource = this.rtt;
node.Scale = new vec3(1, 1, 1) * 6;
node.RotationAxis = new vec3(-1, 0, 0);
node.RotationAngle = 90;
group.Children.Add(node);
}
const float radius = 3;
// arcball.
{
var model = new HalfSphere(radius, 40, 40);
var node = NoShadowNode.Create(model, HalfSphere.strPosition, HalfSphere.strNormal, model.Size);
var list = node.RenderUnit.Methods[0].SwitchList;
var list1 = node.RenderUnit.Methods[1].SwitchList;
var polygonModeSwitch = new PolygonModeSwitch(PolygonMode.Line);
var offsetSwitch = new PolygonOffsetFillSwitch();
list.Add(polygonModeSwitch);
list1.Add(polygonModeSwitch);
var cmd = node.RenderUnit.Methods[0].VertexArrayObjects[0].DrawCommand as DrawElementsCmd;
cmd.VertexCount = cmd.VertexCount / 2; // render only half a sphere.
group.Children.Add(node);
}
// lines.
{
var node = LinesNode.Create(radius);
group.Children.Add(node);
this.linesNode = node;
}
// fan
{
var node = FanNode.Create(radius);
group.Children.Add(node);
this.fanNode = node;
}
root.Children.Add(group);
this.groupNode = group;
}
return(root);
}
private SceneNodeBase GetPropellerRTT()
{
var teapot = TeapotNode.Create();
teapot.Scale *= 0.5f;
int width = 600, height = 400;
var innerCamera = new Camera(new vec3(0, 2, 5), new vec3(0, 0, 0), new vec3(0, 1, 0), CameraType.Ortho, width, height);
var rtt = new RenderToTexttureNode(width, height, innerCamera, new ColoredFramebufferProvider());
rtt.Children.Add(teapot);
var billboard = TextureBillboardNode.Create(rtt as ITextureSource, width, height);
var group = new GroupNode();
group.Children.Add(rtt); // rtt must be before billboard.
group.Children.Add(billboard);
group.WorldPosition = new vec3(3, 0.5f, 0); // this looks nice.
var propeller = GetPropellerFlabellum();
propeller.Children.Add(group);
return(propeller);
}
private void FormMain_Load(object sender, EventArgs e)
{
var teapot = TeapotNode.Create();
this.teapot = teapot;
int width = 400, height = 200;
var rtt = new RenderToTexttureNode(width, height, new Camera(new vec3(0, 0, 5), new vec3(0, 0, 0), new vec3(0, 1, 0), CameraType.Perspecitive, width, height), new ColoredFramebufferProvider());
rtt.Children.Add(teapot);// rendered to framebuffer, then to texture.
this.rtt = rtt;
var rectangle = RectangleNode.Create();
//var rectangle = new LegacyRectangleRenderer();//LegacyRectangleRenderer dosen't work in rendering-to-texture.
rectangle.TextureSource = rtt;
rectangle.Scale = new vec3(7, 7, 7);
this.rectangle = rectangle;
var group = new GroupNode();
group.Children.Add(rtt);
group.Children.Add(rectangle);
var position = new vec3(5, 1, 4);
var center = new vec3(0, 0, 0);
var up = new vec3(0, 1, 0);
var camera = new Camera(position, center, up, CameraType.Perspecitive, this.winGLCanvas1.Width, this.winGLCanvas1.Height);
this.scene = new Scene(camera)
{
ClearColor = Color.SkyBlue.ToVec4(),
RootElement = group,
};
var list = new ActionList();
var transformAction = new TransformAction(scene);
list.Add(transformAction);
var renderAction = new RenderAction(scene);
list.Add(renderAction);
this.actionList = list;
}