Opengl coords free#
Opengl coords windows#

Step 1: First you will need to convert mouse coords to a direction. 2) Perform something like a raycast to find to world coordinate. 2 is simple, and since your question is on OpenGL, I''ll put out some information for you on 1. There are to steps to converting cursor coordinates to world coordinates: 1) Convert the mouse coords to a direction. Homogeneous coordinates, and Normalized Device Coordinates in OpenGL Within the OpenCV/H-Z framework, there three coordinate frames: an image coordinate frame, camera coordinate frame, and a world coordinate frame. Shaders that are intended to run in this. GLCLAMPTOEDGE: The coordinate will simply be clamped between 0 and 1. Ok, what you''re asking is really two parts - 1) converting screen/window coordinates to world coordinates, and 2) movement handling of mouse movement to objectundercontrol movement. In the OpenGL graphics pipeline, the fragment processor is the programmable unit that operates on fragment values.

GLMIRROREDREPEAT: The texture will also be repeated, but it will be mirrored when the integer part of the coordinate is odd.

Opengl coords windows#

To compile the code, prepare the MinGW environment First MinGW C++ program on Windows, and add FreeGLUT support MinGW Freeglut 64bit on Windows Example. The texture coordinates are then interpolated over the triangle giving us texture coordinates for each pixel. OpenGL offers 4 ways of handling this: GLREPEAT: The integer part of the coordinate will be ignored and a repeating pattern is formed. OpenGL requires that the visible coordinates fall between the range -1.0 and 1.

Opengl coords free#

Im not sure that gluUnproject is the way to go here if the mouse isnt over the triangle, the point you get back wont be on its plane and the triangle will have to move in free 3D space to point there. #include #include #include #include using std :: cout using std :: cerr using std :: endl #include using std :: fixed using std :: setprecision using std :: setw #include class RenderState When assigning a texture to an object, you need to declare the texture coordinates, little values between 0 and 1 that tell us which part of the image maps. Also, using GetCursorPos gets the position in Windows coords, not OpenGL ones, hence the top-equals-zero thing.