Posted By: Pappenheimer
Move Vertex in Direction of its Normal - 08/21/11 14:09
As always, I probably missed something obvious.
As the title says, the vertices should move in direction of their normals.
As you might see in the code, I tried several approaches.
Each try results in the same - only a few vertices seemed at least to move in direction of the normals, all others move ..errm ...different...
There is something wrong with the hit point as well, but at least from the given camera position and angle this seems to be fine.
Any hints are welcome.
Thank you for your patience.
You can copy the code into an empty script and save and start it.
Right mouse button dragging turns the object, left click on the object influences the vertices.
As the title says, the vertices should move in direction of their normals.
As you might see in the code, I tried several approaches.
Each try results in the same - only a few vertices seemed at least to move in direction of the normals, all others move ..errm ...different...
There is something wrong with the hit point as well, but at least from the given camera position and angle this seems to be fine.
Any hints are welcome.
Thank you for your patience.
You can copy the code into an empty script and save and start it.
Right mouse button dragging turns the object, left click on the object influences the vertices.
Code:
#include <acknex.h>
#include <default.c>
ENTITY* object;
function deform_model()
{
var vertices_max =0;
var vertex_counter =0;
VECTOR temp;
VECTOR vertex_pos;
VECTOR temp_normal;
mouse_mode = 1;
mouse_pointer = 1;
mouse_range = 4000;
while(1)
{
mouse_pos.x = mouse_cursor.x;
mouse_pos.y = mouse_cursor.y;
if(mouse_ent)
{
if(mouse_left)
{
me = mouse_ent;
//send a trace at the object's surface
vec_set(temp.x, camera.pan);
vec_for_angle(temp.x, temp.x);
vec_normalize(temp.x,1000);
vec_add(temp.x, mouse_pos3d);
c_trace(mouse_pos3d,temp.x, IGNORE_PASSABLE | USE_POLYGON| SCAN_TEXTURE);
//get the hit point
vec_set(temp.x,hit.x);
//get the account of vertices of that model
vertices_max = ent_status(my, 1);
//count through the vertices
while(vertex_counter <= vertices_max)
{
vec_set(vertex_pos.x, nullvector);
vec_for_vertex(vertex_pos.x, me, vertex_counter);
//look for the vertices within a certain distance of the hit point
if(vec_dist(vertex_pos.x, temp.x)< 4)
{
vec_set(temp_normal.x, hit.nx);//move in direction of the hit normal
vec_set(vertex_pos.x, nullvector);
vec_for_vertex(vertex_pos.x, me, vertex_counter);
// vec_diff(temp_normal.x,vertex_pos.x, my.x);//move away from the model's origin
// vec_for_normal(temp_normal.x, my, vertex_counter);//move in direction of the vertex' normal
// vec_scale(temp_normal.x, 1);
vec_add(vertex_pos.x, temp_normal.x);
vec_to_mesh(vertex_pos.x, my, vertex_counter);
}
vertex_counter += 1;
}
ent_fixnormals(my,0);//recalculate the normal after moving the vertices
c_setminmax(me);//recalculate the collision
while(mouse_left)wait(1);
}
}
vertex_counter = 0;
if(mouse_right)
{
object.pan += mouse_force.x;
object.tilt += mouse_force.y;
}
camera.x += mickey.z * 0.1;
wait(1);
}
}
function main()
{
level_load(NULL);
you = ent_create(SPHERE_MDL, nullvector, NULL);
object = you;
deform_model();
camera.x = -100;
// camera.z = 20;
// camera.tilt = -10;
}