Methods and apparatus for drawing contours of objects in video games

A computer-readable storage medium storing a program for a video game, which draws an object comprised of a plurality of polygons,

• wherein said program is structured so as to make a computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing each polygon forming said object and drawing each polygon forming said contour-drawing object in an optional contour color in accordance with a drawing order of said polygons resulting from sequencing of said polygons from the greatest distance from the view point, set in said setting.

A computer-readable storage medium storing a program for a video game, which draws an object comprised of a plurality of polygons,

• wherein said program is structured so as to make a computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing a pixel according to a polygon having a distance closest to the view point, set in said setting, out of polygons projectable into said pixel, wherein when the polygon projected into the pixel is a polygon forming said object, said pixel is drawn according to said polygon and wherein when the polygon projected into the pixel is a polygon forming said contour-drawing object, said pixel is drawn in an optional contour color.

An object drawing method in a video game, which draws an object in a virtual space, said object drawing method comprising:

• generating a contour-drawing object having a size greater than that of said object;
• determining positions of said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from a view point;
• and
• drawing said object at said position thus determined and drawing said contour-drawing object in an optional contour color and at said determined position except for an overlapping portion between said object and said contour-drawing object when observed from the view point.

An object drawing method in a video game, which draws an object comprised of a plurality of polygons, said object drawing method comprising:

• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing each polygon forming said object and drawing each polygon forming said contour-drawing object in an optional contour color in accordance with a drawing order of said polygons resulting from sequencing of said polygons from the greatest distance from the view point, set in said setting.

An object drawing method in a video game, which draws an object comprised of a plurality of polygons, said object drawing method comprising:

• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing a pixel according to a polygon having a distance closest to the view point, set in said setting, out of polygons projectable into said pixel, wherein when the polygon projected into the pixel is a polygon forming said object, said pixel is drawn according to said polygon and wherein when the polygon projected into the pixel is a polygon forming said contour-drawing object, said pixel is drawn in an optional contour color.

A video game apparatus, which comprises

• a computer-readable storage medium storing a program for a video game which draws an object in a virtual space;
• and
• a computer which reads out at least one part of said program from said recording medium to perform, by reading out at least one part of said program from said storage medium, generating a contour-drawing object having a size greater than that of said object;
• determining positions of said contour-drawing object and said object so that said contour-drawing object thus generated in said generation is positioned behind said object when observed from a view point;
• and
• drawing said object at said position thus determined by said position determination and drawing said contour-drawing object in an optional contour color and at said position determined by said position determination except for an overlapping portion between said object and said contour-drawing object when observed from the view point.

A video game apparatus, which comprises

• a computer-readable storage medium storing a program for a video game which draws an object comprised of a plurality of polygons in a virtual space;
• and
• a computer which reads out at least one part of said program from said recording medium to perform, by reading out at least one part of said program from said storage medium, generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated by said generation is positioned behind said object when observed from the view point;
• and drawing each polygon forming said object and drawing each polygon forming said contour-drawing object in an optional contour color in accordance with a drawing order of said polygons resulting from sequencing of said polygons from the greatest distance from the view point, set in said setting.

A video game apparatus, which comprises:

• a computer-readable storage medium storing a program for a video game which draws an object comprised of a plurality of polygons in a virtual space;
• and
• a computer which reads out at least one part of said program from said recording medium to perform, by reading out at least one part of said program from said storage medium,
• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated in said generation is positioned behind said object when observed from the view point;
• and
• drawing a pixel according to a polygon having a distance closest to the view point, set in said setting out of polygons projectable into said pixel, wherein when the polygon projected into the pixel is a polygon forming said object, said pixel according to said polygon is drawn and wherein when the polygon projected into the pixel is a polygon forming said contour-drawing object, said pixel in an optional contour color is drawn.

A video game apparatus which draws an object in a virtual space, comprising:

• a computer;
• and
• a computer-readable storage medium storing a program to be executed by said computer,
• wherein said program is structured so as to make said computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• determining positions of said contour-drawing object and said object so that said contour-drawing object thus generated in said generation is positioned behind said object when observed from a view point;
• and
• drawing said object at said position thus determined in said position determination and drawing said contour-drawing object in an optional contour color and at said position determined in said position determination except for an overlapping portion between said object and said contour-drawing object when observed from the view point.

A computer program for a video game, which draws an object in a virtual space,

• wherein said computer program is structured so as to make a computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• determining positions of said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from a view point;
• and
• drawing said object at said position thus determined and drawing said contour-drawing object in an optional contour color and at said determined position except for an overlapping portion between said object and said contour-drawing object when observed from the view point.

A computer program for a video game, which draws an object comprised of a plurality of polygons,

• wherein said computer program is structured so as to make a computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing each polygon forming said object and drawing each polygon forming said contour-drawing object in an optional contour color in accordance with a drawing order of said polygons resulting from sequencing of said polygons from the greatest distance from the view point, set in said setting.

A computer program for a video game, which draws an object comprised of a plurality of polygons,

• wherein said computer program is structured so as to make a computer perform:
• generating a contour-drawing object having a size greater than that of said object;
• setting a distance from a view point of each polygon forming said contour-drawing object and said object so that said contour-drawing object thus generated is positioned behind said object when observed from the view point;
• and
• drawing a pixel according to a polygon having a distance closest to the view point, set in said setting, out of polygons projectable into said pixel, wherein when the polygon projected into the pixel is a polygon forming said object, said pixel is drawn according to said polygon and wherein when the polygon projected into the pixel is a polygon forming said contour-drawing object, said pixel is drawn in an optional contour color.