| calculateSEP (Node_part, Tolerance) |
| Step 0. Initialize constants |
| r ⟵ image radius |
| offset ⟵ camera height |
| Node_part ⟵ role of Node in scene (type of space) |
| Tolerance ⟵ allowable range of the SEP |
| Step 1. Check click_mouse if FALSE |
| Step 1.1 Read topological data and obtain node parameters |
| Node_ath, Node_atv ⟵ position of Node in scene |
| Node_part ⟵ part of Node in scene |
| Step 2. Define function to obtain coordinates from user input |
| getCoordinate (mouse_ath, mouse_atv, r, offset) { |
| If camera direction is North, set Hd ⟵0, increasing clockwise |
| Angle_H ⟵ (Hd + mouse_ath) PI/180 |
| Angle_V ⟵ mouse_atv PI/180 |
| ⟵ r cos (Angle_H) |
| ⟵ r sin (Angle_H) |
| ⟵ offset + rsin (Angle_V)} |
| Step 3. Set click_mouse as TRUE |
| Step 3.1 Obtain mouse_ath, mouse_atv from click |
| Step 3.2 Calculate coordinates |
| Step 3.3.1 Obtain coordinate of user identified point |
| ⟵ getCoordinate (mouse_ath, mouse_atv, r, offset) |
| Step 3.3.2 If Node_part is Indoor Space |
| ⟵ getCoordinate (mouse_ath, mouse_atv, r, offset) |
| Step 3.3.3 If Node_part is Indoor Object |
| ⟵ getCoordinate (mouse_ath, mouse_atv, r, offset) |
| Step 4. Calculate SEP matrix |
| Step 4.1 Initialize: blank 3 x 3 SEP Matrix ⟵ 0 |
| Step 4.2 Set Tolerance depending on type of space or type of object |
| Step 4.2.1 Calculate SEP Matrix values along XY plane |
| IF XY distance is less than Tolerance, SEP_Matrix [0][0] ⟵ 1 |
| IF XY distance is same as Tolerance, SEP_Matrix [0][1] ⟵ 1 |
| IF XY distance is greater than Tolerance, SEP_Matrix [0][2] ⟵ 1 |
| Step 4.2.2 Calculate SEP Matrix values along YZ plane |
| IF YZ distance is less than Tolerance, SEP_Matrix [1][0] ⟵ 1 |
| IF YZ distance is same as Tolerance, SEP_Matrix [1][1] ⟵ 1 |
| IF YZ distance is greater than Tolerance, SEP_Matrix [1][2] ⟵ 1 |
| Step 4.2.3 Calculate SEP Matrix values along XZ plane |
| IF XZ distance is less than Tolerance, SEP_Matrix [2][0] ⟵ 1 |
| IF XZ distance is same as Tolerance, SEP_Matrix [2][1] ⟵ 1 |
| IF XZ distance is greater than Tolerance, SEP Matrix [2][2] ⟵ 1 |
