opentk

I want to visually join two circles that are overlapping so that becomes I already have methods for partial circles, but now I need to know how large the overlapping angle for earch circle is, and I don't know how to do that. Anyone got an Idea? Phi= ArcTan[ Sqrt[4 * R^2 - d^2] /d ] HTH! Edit For two different radii: Simplifying a little: Phi= ArcTan[Sqrt[-d^4 -(R1^2 - R2^2)^2 + 2*d^2*(R1^2 + R2^2)]/(d^2 +R1^2 -R2^2)] Edit If you want the angle viewed from the other circle center, just exchange R1 by R2 in the last equation. Here is a sample implementation in Mathematica: f[center1_, d_, R1_,

This generates the 25 main vertices. For x As Single = -1 To 1 Step 0.5F For y As Single = 1 To -1 Step -0.5F Dim pt1 As New Vector3(x, y, 0) tFloats.Add(pt1) Next Next This is the indices, which makes up 16 tiles made of 32 triangles, I actually generate them but this is the first row: Dim inasd() As Integer = { 0, 2, 10, 2, 10, 12, 10, 12, 20, 12, 20, 22, 20, 22, 30, 22, 30, 32 } Now I'm trying to apply a texture to every single triangle, 1 texture per tile. 16 different textures. Now my problem lies within the fact that when I use GL.DrawRangeElements(PrimitiveType.Triangles, 0, indices

Here's the vertex shader: uniform mat4 projection; uniform mat4 view; uniform mat4 model; void main(void) { gl_Position = projection * view * model * gl_Vertex; gl_TexCoord[0] = gl_MultiTexCoord0; } My understanding is that using various transformations, the model space is eventually turned to clip space, which is a box bound by each unit in each axis drawn directly to the viewport, i.e. something at (-1, 1,0) is at the top left of the viewport. When I remove all matrix transforms from the shader, gl_Position = gl_Vertex; and pass in, as the model, a simple quad public Vector3[] verts = new

Using below code I can display an image in openGL control. Which is in rectangular shape. Now I want to project top and bottom area of this rectangular to a cylindrical shape.I mean need to perform a rectangular to cylidrical projection on openGL. How can I achieve this? private void CreateShaders() { /***********Vert Shader********************/ vertShader = GL.CreateShader(ShaderType.VertexShader); GL.ShaderSource(vertShader, @"attribute vec3 a_position; varying vec2 vTexCoord; void main() { vTexCoord = (a_position.xy + 1) / 2; gl_Position = vec4(a_position, 1); }"); GL.CompileShader

Background I currently have an environment I have created to which I load some shapes (for reference to where I am) and am trying to get the controls to move forward, backwards, and rotate where I am looking. I have the forward and backwards worked out using my lookat point and camera position point. I am trying to rotate 360 degrees but appear to get some strange limits based on what I have so far. I am outputting my xangle to see where I am at always.. In order to rotate, I change the lookat variable (x,y, and z) while keeping the position (x,y,z) the same. Problem When continuously