clothsimulation using opengl

Question

some portion of my code where I m getting error,in line 249,252 and 255

void drawTriangle(Particle *p1, Particle *p2, Particle *p3, const Vec3 color)         


        

Answer 1

If the return type of

p1->getNormal().normalized()

is a value, it is a temporary value that doesn't have an address.

However if you store it in a varilable

auto instance = p1->getNormal().normalized();

You can take the address of instance. If this is a good idea or not depends on if glNormal3fv expects that pointer to be valid longer than the scope of your function.