public void SetDefaultWorldCamera(Vector3 target)
{
// Do a little trigonometry, we want to look at our target from a distance of 1500 units at an angle of 70deg
var distance = 2000;
var angle = MathHelper.DegreesToRadians(60);
var location = target + new Vector3(0, -distance * (float)Math.Cos(angle), distance * (float)Math.Sin(angle));
var cameraMatrix = Matrix4.CreateRotationY(angle) * Matrix4.CreateRotationZ(MathHelper.PiOver2) * Matrix4.CreateTranslation(location);
// Set camera
ActiveCamera = new Camera(cameraMatrix, "worldspawn");
}
protected override void OnUpdateFrame(FrameEventArgs e)
{//OnUpdateFrame is called every Frame
base.OnUpdateFrame(e);
time += (float)e.Time;
//Buffer handeling
GL.BindBuffer(BufferTarget.ArrayBuffer, shaders[activeShader].GetBuffer("vPosition"));
GL.BufferData <Vector3>(BufferTarget.ArrayBuffer, (IntPtr)(vertdata.Length * Vector3.SizeInBytes), vertdata, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(shaders[activeShader].GetAttribute("vPosition"), 3, VertexAttribPointerType.Float, false, 0, 0);
if (shaders[activeShader].GetAttribute("vColor") != -1)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, shaders[activeShader].GetBuffer("vColor"));
GL.BufferData <Vector3>(BufferTarget.ArrayBuffer, (IntPtr)(coldata.Length * Vector3.SizeInBytes), coldata, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(shaders[activeShader].GetAttribute("vColor"), 3, VertexAttribPointerType.Float, true, 0, 0);
}
//uniform matrix
/*mviewdata[0] = Matrix4.CreateRotationY(1f * time) *
* Matrix4.CreateRotationX(0.4f * time) *
* Matrix4.CreateTranslation(1.0f, 0.0f, -3.0f) *
* Matrix4.CreatePerspectiveFieldOfView(1.3f, ClientSize.Width / (float)ClientSize.Height, 1.0f, 40.0f);*/
mviewdata[0] = Matrix4.CreateRotationY(1f * time) *
Matrix4.CreateRotationX(0.4f * time) *
Matrix4.CreateScale(10) *
Matrix4.CreateTranslation(0.0f, 0.0f, -100.0f) *
Matrix4.CreatePerspectiveFieldOfView(1.3f, ClientSize.Width / (float)ClientSize.Height, 1.0f, 400.0f);
GL.UniformMatrix4(shaders[activeShader].GetUniform("modelview"), false, ref mviewdata[0]);
//Index Buffer
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ibo_elements);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(indicedata.Length * sizeof(int)), indicedata, BufferUsageHint.StaticDraw);
//Enable Program
GL.UseProgram(shaders[activeShader].ProgramID);
//Clear buffer
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
}
protected override void OnRenderFrame(FrameEventArgs e)
{
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
shader.Use();
controller.NewFrame(this);
ImGui.SliderFloat("Scale", ref scale, 0, 10);
ImGui.SliderFloat("Angle", ref angle, -3.14f, 3.14f);
ImGui.SliderFloat("Angle_z", ref angle_z, -3.14f, 3.14f);
ImGui.SliderFloat("Distance", ref dist, 0, 10.0f);
ImGui.Checkbox("Perspective", ref persp);
shader.SetUniform("scaleFactor", scale);
var model = Matrix4.CreateRotationY(angle) * Matrix4.CreateRotationX(angle_z) * Matrix4.CreateTranslation(0, 0, -dist);
shader.SetUniform("model", model);
//var projection = Matrix4.CreateOrthographic(10, 10, -2, 2);
//var projection = Matrix4.CreateOrthographicOffCenter(0, 1, 1, 0, -2, 2);
//var projection = Matrix4.CreatePerspectiveOffCenter(-500,1 , 1, -500, 0.1f, 100.0f);
var projection = persp
? Matrix4.CreatePerspectiveFieldOfView((float)(Math.PI / 2), (float)Width / Height, 0.1f, 100.0f)
: Matrix4.CreateOrthographic(10, 10, -7, 7);
shader.SetUniform("projection", projection);
//scale += 0.001f;
//GL.BindVertexArray(VertexArrayObject);
//GL.PointSize(50);
//GL.DrawArrays(PrimitiveType.Points, 0, 4);
GL.DrawElements(PrimitiveType.Triangles, mesh.Indeces.Length, DrawElementsType.UnsignedInt, 0);
controller.Render();
Context.SwapBuffers();
base.OnRenderFrame(e);
}