Roy tracing appratus and method

A texture mapping system using a method of selecting a MIP-MAP level, comprising:

• an object information storage unit for storing object information about an object to be displayed in a screen, the object information including a number of the at least one object, shape of the at least one object, material of the at least one object in the screen and location of a corresponding object on a space in the screen;
• an object information identification unit for fetching object information about a target object to be displayed in the screen from the object information storage unit and identifying the fetched object;
• an algorithm determination unit for analyzing the object information fetched from the object information identification unit and determining an algorithm for selecting a MIP-MAP level based on the analyzed object information;
• a distance measuring method operation unit for receiving the object information of the target object from the object information identification unit and calculating a distance in which a ratio of a pixel and a texel becomes 1:1 according to a result of the determination of the algorithm determination unit;
• and
• a MIP-MAP level selection unit for selecting the MIP-MAP level based on the distance calculated by the distance measuring method operation unit.

A texture mapping system using a method of selecting a MIP-MAP level, comprising:

• a pre-processing unit for calculating a comparison distance in which a ratio of a pixel and a texel becomes 1:1 by a distance measuring method;
• a triangle information storage unit for mapping information about a primitive triangle to the comparison distance calculated by the pre-processing unit and storing the mapped information and comparison distance;
• a comparison distance fetching unit for receiving a number of the primitive triangle to be subject to texture conversion and fetching a comparison distance of the primitive triangle corresponding to the corresponding number from the triangle information storage unit;
• a ray information storage unit for accumulating and storing pieces of the information about a distance of a ray;
• a final distance calculation unit for summing up a distance up to a triangle hit by a current ray from a staring point and the distance accumulated and stored in the ray information storage unit;
• and
• a MIP-MAP level selection unit for selecting a MIP-MAP level based on the distance summed up by the final distance calculation unit.