saveMesh with ObjectMeshDynamic containing multiple surfaces Bug

[carl.sutton]

Hello,

 

I have found that both my own code that calls engine.editor.saveMesh function and the mesh export button in the editor will cause unigine to crash and will fail to make a combined mesh file when trying to export using ObjectMeshDynamic nodes that have more than one surface. Just to make sure I havn't done anything stupid, here is the code I used to make my multi surface dynamic object which then refuses to export to a mesh;

 

ObjectMeshDynamic CreateCylinder(ObjectMeshDynamic mesh,float radius,float height, vec4 texCoord,
 int stacks = 1,int slices = 32,Mat4 transform = Mat4_identity)
{
 height /= 2.0f;

 float k = floor(PI * radius / height);

 Mat4 rtransform = rotation(transform);

 mesh.addFan(slices + 2);
 mesh.addVertex(transform * vec3(0.0f,0.0f,height));
 mesh.addTexCoord(vec4(0.5f,0.5f,0.0f,0.0f));
 mesh.addNormal(rtransform * vec3(0.0f,0.0f,1.0f));
 for(int j = 0; j <= slices; j++) {
  float s = float(j) / slices;
  float theta = PI2 * s - PI05;

  vec3 normal = vec3(cos(theta),sin(theta),0.0f);
  mesh.addVertex(transform * (vec3(0.0f,0.0f,height) + normal * radius));
  mesh.addTexCoord(vec4(normal.x * 0.5f + 0.5f,0.5f - normal.y * 0.5f,0.0f,0.0f));
  mesh.addNormal(rtransform * vec3(0.0f,0.0f,1.0f));
 }

 mesh.addFan(slices + 2);
 mesh.addVertex(transform * vec3(0.0f,0.0f,-height));
 mesh.addTexCoord(vec4(0.5f,0.5f,0.0f,0.0f));
 mesh.addNormal(rtransform * vec3(0.0f,0.0f,-1.0f));
 for(int j = 0; j <= slices; j++) {
  float s = float(j) / slices;
  float theta = PI2 * s - PI;

  vec3 normal = vec3(sin(theta),cos(theta),0.0f);
  mesh.addVertex(transform * (vec3(0.0f,0.0f,-height) + normal * radius));
  mesh.addTexCoord(vec4(normal.x * 0.5f + 0.5f,normal.y * 0.5f + 0.5f,0.0f,0.0f));
  mesh.addNormal(rtransform * vec3(0.0f,0.0f,-1.0f));
 }
 mesh.addSurface("end"); //SURFACE 1
 int num_vertex = mesh.getNumVertex();

 for(int i = 0; i < stacks; i++) {

  for(int j = 0; j < slices; j++) {
int offset = num_vertex + (slices + 1) * i + j;

mesh.addIndex(offset + 0);
mesh.addIndex(offset + slices + 1);
mesh.addIndex(offset + 1);

mesh.addIndex(offset + slices + 2);
mesh.addIndex(offset + 1);
mesh.addIndex(offset + slices + 1);
  }
 }

 for(int i = 0; i <= stacks; i++) {
  float t = float(i) / stacks;

  for(int j = 0; j <= slices; j++) {
float s = float(j) / slices;
float theta = PI2 * s - PI05;

vec3 normal = vec3(cos(theta),sin(theta),0.0f);

mesh.addVertex(transform * (vec3(0.0f,0.0f,height - height * t * 2.0f) + normal * radius));
//mesh.addTexCoord(vec4(s * k,t,0.0f,0.0f));
mesh.addTexCoord(vec4(texCoord.x,lerp(texCoord.y, texCoord.w, t),0.0f,0.0f)); //FIXME texcoords are incorrect
mesh.addNormal(rtransform * normal);
  }
 }
 mesh.addSurface("body");  //SURFACE 2
 mesh.updateBounds();
 mesh.updateTangents();

 return mesh;
}
};

 

I have tried the above code without making it multi surfaced and the problem does not occur. It will be much appreciated if a fix could be found for this as I would prefer not to have to make a seperate mesh for each surface or use some other workaround that converts dynamic to a node type that will export.

 

Thanks

[frustum]

Thanks, that will be fixed in the next SDK.