[SOLVED] getIntersection

[sergey.pozhidaev]

on ObjectMesh & ObjectDynamic objects getIntersection does not work, mask and setintersection flags = 1

[frustum]

ObjectDynamic doesn't have intersection code.

You have to provide invisible intersection mesh inside ObjectMesh.

[sergey.pozhidaev]

i only want to create custom mesh with Unigine-pick system and modify it anytime

 

ObjectMesh o = add_editor(new ObjectMesh(0));

 

o.addEmptySurface("surf0", 4, 6);

 

o.setVertex(0,vec3(-1.5f,8,0),0);

o.setVertex(1,vec3(-1.5f,1.5f,0),0);

o.setVertex(2,vec3(-11,8,0),0);

o.setVertex(3,vec3(-11,1.5f,0),0);

 

o.setTexCoord(0,vec4(10,-6,0,0),0);

o.setTexCoord(1,vec4(10,1,0,0),0);

o.setTexCoord(2,vec4(0,-6,0,0),0);

o.setTexCoord(3,vec4(0,1,0,0),0);

 

o.setTangent(0,vec4(1,0,0.000015f,-1),0);

o.setTangent(1,vec4(1,0,0.000015f,-1),0);

o.setTangent(2,vec4(1,0,0.000015f,-1),0);

o.setTangent(3,vec4(1,0,0.000015f,-1),0);

 

vec3 norm = vec3(-0.000015f,-0.000015f,1);

o.setNormal(0,norm,0);

o.setNormal(1,norm,0);

o.setNormal(2,norm,0);

o.setNormal(3,norm,0);

 

o.setIndex(0,2,0);

o.setIndex(1,3,0);

o.setIndex(2,0,0);

 

o.setIndex(3,1,0);

o.setIndex(4,0,0);

o.setIndex(5,3,0);

 

o.setMaterial("mesh_base","*");

o.setProperty("surface_base","*");

 

o.setEnabled(1,0);

o.setIntersectionMask(1,0);

o.setIntersection(1,0);

 

 

 

and then i use:

Vec3 p0,p1;

Unigine::getPlayerMouseDirection(p0,p1);

 

int ret[0];

Object o = engine.world.getIntersection(p0,p1,1,ret);

 

but unigine does not detect my custom mesh

[frustum]

Call "o.updateSurfaces();" after mesh creation.

[sergey.pozhidaev]

i did it :D "unknown ObjectMesh class member updateSurfaces();"

[frustum]

"ObjectMesh::updateSurfaces" method should exist in the latest SDK update.

[sergey.pozhidaev]

how set bounds of ObjectMesh? it is not itersecting by getIntersection,

how get intersection by Unigine on Custom ObjectMesh? or some other mesh, i need construct one mesh and get intersection by Unigine getIntersection, or i have to write own intersector for custom meshes?

[sergey.pozhidaev]

ok, i know what is my problem: need to update bounds of custom mesh, but what i need to do for that?

[sergey.pozhidaev]

ok, i`l use ObjectMeshDynamic - it works fine , because it consists updateBounds();

[frustum]

Call "o.setSurfaceTransform(mat4_identity,0);" to recalculate bounds.

ObjectMesh is much more effective for intersection and collision than ObjectMeshDynamic.

[sergey.pozhidaev]

bounds recalced, but still no intersection :D , something else? on ObjectMeshDynamic it works

[unclebob]

Hi Sergey!

 

Sorry for late reply, have you still issuing this problem?

 

I've modified mesh_01 example in samples/objects folder and added intersection test so it might help you.

/*
 */
void update_scene() {
	
	while(1) {
		
		float ifps = engine.game.getIFps() * 0.1f;
		
		foreach(ObjectMesh mesh, i = 0; meshes; i++) {
			mesh.setWorldTransform(Mat4(mesh.getTransform() * quat(1.0f,1.0f,1.0f,ifps * i)));
		}
		
		vec3 p0,p1;
		Unigine::getPlayerMouseDirection(p0,p1);
		
		int ret[0];
		Object o = engine.world.getIntersection(p0,p1,1,ret);
		
		if(o != NULL) {
			forloop(int i = 0; o.getNumSurfaces()) {
				o.setMaterialParameter("diffuse_color",vec4(1.0f,0.0f,0.0f,1.0f),i);
				o.setMaterialTexture("diffuse","",i);
			}
		}
		
		wait;
	}
}