private unsafe void AddTestNode(Scene scene)
{
Shader shader = new Shader(GameWindow.SHADER_PATH + "Vert2DColorUVShader.glsl", GameWindow.SHADER_PATH + "pointTexFragShader.glsl");
var texture = new Texture("Arrow.png");
var node = new Node {
Position = new Vector3(0, 0, -3)
};
node.Model = Matrix4.CreateTranslation(node.Position);
VTest2 quad = new VTest2();
quad.PX1 = -0.5f; quad.PY1 = -0.5f; quad.U1 = 0f; quad.V1 = 1f; quad.r1 = 0xff; quad.g1 = 0xff; quad.b1 = 0xff; quad.a1 = 0xff;
quad.PX2 = 0.5f; quad.PY2 = -0.5f; quad.U2 = 1f; quad.V2 = 1f; quad.r2 = 0x00; quad.g2 = 0x00; quad.b2 = 0xff; quad.a2 = 0xff;
quad.PX3 = -0.5f; quad.PY3 = 0.5f; quad.U3 = 0f; quad.V3 = 0f; quad.r3 = 0x00; quad.g3 = 0xff; quad.b3 = 0x00; quad.a3 = 0xff;
quad.PX4 = 0.5f; quad.PY4 = 0.5f; quad.U4 = 1f; quad.V4 = 0f; quad.r4 = 0xff; quad.g4 = 0x00; quad.b4 = 0x00; quad.a4 = 0xff;
Vertex2DColorUV vertex = new Vertex2DColorUV();
var buffer = Serialize(quad);
var vertexBuffer = new VertexBuffer <Vertex2DColorUV>(buffer, sizeof(VTest2), vertex.GetVertexFormat());
uint[] indices = new uint[6] {
0, 1, 2, 2, 1, 3
};
var indexBuffer = new IndexBuffer(indices);
var renderer = new Renderer(vertexBuffer, indexBuffer, shader);
renderer.AddTexture(texture);
renderer.BlendingFlag = true;
renderer.CullFaceFlag = false;
node.Add(renderer);
scene.Add(node);
}
private unsafe void AddTestNode1(Scene scene)
{
Shader shader = new Shader(GameWindow.SHADER_PATH + "Vert2DColorUVShader.glsl", GameWindow.SHADER_PATH + "4channelFragShader.glsl");
var texture = new Texture("CellCorner.png");
var node = new Node {
Position = new Vector3(0, 0, -3)
};
node.Model = Matrix4.CreateTranslation(node.Position);
Vertex2DColorUV[] quad = new Vertex2DColorUV[4]
{
// Texture coords - top is 0, bottom is 1
new Vertex2DColorUV(new Vector2(-0.5f, -0.5f), new Vector2(0, 1), Vertex2DColorUV.WHITE),
new Vertex2DColorUV(new Vector2(0.5f, -0.5f), new Vector2(1, 1), Vertex2DColorUV.WHITE),
new Vertex2DColorUV(new Vector2(-0.5f, 0.5f), new Vector2(0, 0), Vertex2DColorUV.WHITE),
new Vertex2DColorUV(new Vector2(0.5f, 0.5f), new Vector2(1, 0), Vertex2DColorUV.WHITE),
};
uint[] indices = new uint[6] {
0, 1, 2, 2, 1, 3
};
var indexBuffer = new IndexBuffer(indices);
var vertexBuffer = new VertexBuffer <Vertex2DColorUV>(quad);
var renderer = new Renderer(vertexBuffer, indexBuffer, shader);
renderer.AddTexture(texture);
renderer.BlendingFlag = true;
node.Add(renderer);
scene.Add(node);
}
public unsafe void RenderDrawData(ImDrawDataPtr drawData, int displayW, int displayH)
{
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
int last_texture;
GL.GetInteger(GetPName.TextureBinding2D, out last_texture);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.BlendEquation(BlendEquationMode.FuncAdd);
GL.Disable(EnableCap.CullFace);
GL.Disable(EnableCap.DepthTest);
GL.Enable(EnableCap.ScissorTest);
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
var io = ImGui.GetIO();
drawData.ScaleClipRects(io.DisplayFramebufferScale);
shader.Use();
Matrix4 modelView = Matrix4.Identity;
Matrix4 projection = new Matrix4();
OrthoCamera(io.DisplaySize.X / io.DisplayFramebufferScale.X, io.DisplaySize.Y / io.DisplayFramebufferScale.Y, ref projection);
shader.SetUniformMatrix4("modelView", modelView);
shader.SetUniformMatrix4("projection", projection);
shader.SetSamplerUniform(0, 0);
GL.ActiveTexture(TextureUnit.Texture0);
// Render command lists
for (int n = 0; n < drawData.CmdListsCount; n++)
{
ImDrawListPtr cmd_list = drawData.CmdListsRange[n];
byte * vtx_buffer = (byte *)cmd_list.VtxBuffer.Data;
ushort * idx_buffer = (ushort *)cmd_list.IdxBuffer.Data;
Vertex2DColorUV vertex = new Vertex2DColorUV();
var sz = sizeof(Vertex2DColorUV);
var buffer = new VertexBuffer <Vertex2DColorUV>(vtx_buffer, cmd_list.VtxBuffer.Size * sizeof(Vertex2DColorUV), vertex.GetVertexFormat());
buffer.Bind(shader);
for (int cmd_i = 0; cmd_i < cmd_list.CmdBuffer.Size; cmd_i++)
{
ImDrawCmdPtr pcmd = cmd_list.CmdBuffer[cmd_i];
if (pcmd.UserCallback != IntPtr.Zero)
{
throw new NotImplementedException();
}
else
{
GL.BindTexture(TextureTarget.Texture2D, pcmd.TextureId.ToInt32());
GL.Scissor((int)pcmd.ClipRect.X,
(int)(io.DisplaySize.Y - pcmd.ClipRect.W),
(int)(pcmd.ClipRect.Z - pcmd.ClipRect.X),
(int)(pcmd.ClipRect.W - pcmd.ClipRect.Y));
GL.DrawElements(PrimitiveType.Triangles, (int)pcmd.ElemCount, DrawElementsType.UnsignedShort, new IntPtr(idx_buffer));
}
idx_buffer += pcmd.ElemCount;
}
}
// Restore modified state
GL.BindTexture(TextureTarget.Texture2D, last_texture);
GL.Disable(EnableCap.ScissorTest);
}