I am basically brand new to the gaming industry business wise although I have been a gamer for years. I officially started my game publishing company, and being as though I am only 20, I have no connects to the gaming industry. Of course, I'm still going to do more internet research, but I thought why not ask folks who may have business hands in the gaming community? If anyone is questioning, my game prototype is basically done (I designed it myself) and its very detailed and I am going to start searching for a team to help me build it. Thank you.
How can I get center of scene or node or model? What is best way to do this? Scene structure:
o - Node[s]
o - Model[s] // Mesh
o - Primitive[s] // Sub-Mesh
o local AABB and world AABB
I'm using AABB's center as center of primitive and I'm combining all AABB boxes to build an AABB for scene. When I visualized the boxes it seems work as expected.
But I need to get center of scene, node or model for apply rotation around center. Because I'm using a trackball for rotating attached node or model. Currently I'm using scene's AABB's center as rotation point (pivot), for single object it is working. After rotation is completed center of primitive remains same which it should be, I think. But if I load a scene which contains multiple models or primitives, after rotation is completed center of scene's AABB is moving (I'm using that as center of scene). Because every time rotation is completed, new AABB is calculated for scene by combining all sub AABB boxes. I think this may be a normal because there is no balance between AABB boxes while rotating. For instance if I use two same CUBE without rotations center of new scene's AABB remains same.
My solution (it seems work for now):
I created new center member (vec3) in scene struct:
scene->center = vec3(0);
scene->primCount = 0;
for prim in primitivesInFrustum
scene->center += prim->aabb->center;
scene->center = scene->center / scene->primCount
Now I'm using this center as center of scene instead of scene->aabb->center and it seems work.
My question is that what is best way to get center of scene, node or model? How do you get the center for rotation? Any suggestions? Am I doing right?