| OCR Text |
Show 113 Simulation of Surface Reflective Properties A major factor in the determination of visible intensity is the simulation of the light reflecting off the portion of the surface visible in a picture element. We will begin by dividing this simulation into two categories, the microscopic and the macroscopic. Microscopic properties are those which are too small to be individually discernable within the resolution of the display and so their average effect must be used. Macroscopic effects are those which vary from picture elment to picture element and must be computed separately for each. in directions other than the mirror direction. This then Micro Structure One of the fundamental laws of reflecting from a surface, light incidence and reflection. Simulating optics is that, in forms equal angles of a surface in this manner gives the effect of a perfect mirror: only those portions of the surface with their normals pointing halfway between the eye and the light source will reflect light at the eye. Real substances, however, are less than perfect mirrors and tend to absorb some of the light and scatter it divides the reflection process into two mechanisms. The former, termed specuar reflection, comes from light mirror reflected from the surface of the object. The latter, termed diffuse reflection, comes from light absorbed and re-emitted due to internal reflections. |
