Geomodelling project: Creating 3d Surface based model for geological outcrop using unity and C# code.

1. ⚫

2. Creating 3d Surface based model using Unity

3. Bezier Curve surface parametric model
⚫ Parametric curve used in computer graphics
⚫ Control points , Some points near each other
construction
⚫ Linear
⚫ Quadratic
⚫ High order

4. Stratigy of setting the control
point
⚫ geological observations,
eg. along the dyke, the major eroded surface,
edges, the upper and the lower part of the
outcrop.

5. ⚫ Number, position of control points
⚫ Number of points on u and v directions
⚫ C# code based on bezier curve formulations
⚫ Assign it with control points to mesh

6. First Trial
⚫ 4 raws * each 5 CP
⚫ 20 control points
⚫ Accuracy problem
⚫ Surface was not completely
covered

7. Second Trial
⚫ 5 * 5
⚫ 25 control points
⚫ accuracy increased
⚫ better surface fitting
Our
code

8. ⚫
5 * 8
40 control points
More accuracy
Surface fitting improved

9. ⚫

10. ⚫

11. Workflow
⚫ Creating empty game object (3d mesh)
⚫ Added mesh filter and mesh renderer components
⚫ Creating mother point and child spheres
⚫ Creating materials and assigning them to the spheres
⚫ Assigning a material and c# code to the mesh
⚫ Modifying the code
⚫ Assigning mother point to the c# code and specifiying the
number of points in u and v directions
⚫ Fitting the surface

12. ⚫ Our target is achieved!! ☺
⚫ Few number of control
point
⚫ With a good Accuracy
⚫ And Easy controlling

13. Regards,
Amr Elgabri