Three-dimensional graphic processing device for drawing polygon having vertex data defined by relative value and method therefor

The A three-dimensional graphic processing device, comprising:

• an identifying portion for identifying whether vertex data of a polygon to be drawn is an absolute value or a relative value;
• an operation portion for operating to obtain an absolute value of vertex data identified as a relative value by said identifying portion;
• a generation portion for generating data necessary for drawing based on the absolute value of the vertex data obtained by said operation portion;
• and
• a storage portion for storing an absolute value of vertex data to be a starting point, wherein
• said operation portion is configured to obtain an absolute value of vertex data identified as a relative value by said identifying portion based on the absolute value of vertex data to be a starting point stored in said storage portion,
• said storage portion is configured to store vertex data expressed by an absolute value of a basic polygon, and
• said operation portion is configured to obtain an absolute value of vertex data in a polygon other than said basic polygon based on the vertex data expressed by the absolute value of the basic polygon stored in said storage portion.

A three-dimensional graphic processing method, comprising the steps of:

• identifying whether vertex data of a polygon to be drawn is an absolute value or a relative value;
• operating to obtain an absolute value of vertex data identified as a relative value;
• and
• generating data necessary for drawing based on said obtained absolute value of vertex data, wherein
• said step of operating to obtain the absolute value of vertex data includes the step of operating to obtain an absolute value of vertex data expressed by a relative value in a polygon from vertex data expressed by an absolute value in another polygon.

A three-dimensional graphic processing method, comprising the steps of:

• identifying whether vertex data of a polygon to be drawn is an absolute value or a relative value;
• operating to obtain an absolute value of vertex data identified as a relative value;
• generating data necessary for drawing based on said obtained absolute value of vertex data;
• and
• storing an absolute value of vertex data to be a starting point, wherein
• said step of operating to obtain the absolute value of vertex data includes the step of operating to obtain an absolute value of vertex data expressed by a relative value based on the absolute value of said stored vertex data to be a starting point,
• said step of storing vertex data includes the step of storing vertex data expressed by an absolute value of a basic polygon, and
• said step of operating to obtain the absolute value of vertex data includes the step of operating to obtain an absolute value of vertex data in a polygon other than said basic polygon based on said stored vertex data expressed by the absolute value of the basic polygon.