hi, i did something like this:
i have some objects vertices stored in arrays verts with verts[#][#] = x, verts[#][#] = y, verts[#][#] = z i also have normals but im not sure if i'll need though
i have a mouse function that shoots a ray when i click the screen and im sure that is working right. i used gluunproject to figure that out. then, i made functions for my sphere and cylinder objects that use the quadratic equation to see if a ray hits it. this is working. if i have some sphere at (5, 0, 0) and cylinder at (0,5, 0) it is tested and returns a hit with the ray.
now my problem is to find the point of intersection. i have run the ray direction vector, and origin vector into inverse transformation of the object so it is in "object coordinates" and i think my code is right for that. now i have to find the nearest point on my object that the ray intersects with.
i do not understand how to use my vertices and these ray vectors in object coordinates to find the nearest point ,or any point for that matter.
i assume i use some for loops to loop through my vertices but i dont understand what i compare it too.
im a noob at this stuff but have slowly gotten my way this far only to get stuck here for the past day.
can someone please explain what i should do now or even give some pseudocode. i'd really appreciate it
also i have the 't' value that returned from the quadratic equation. do i use that to get the point somehow?