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2018-06-28T21:04:27Z

1版をインポートしました

wiki>Jwilkins: Created page with "= The Sprite Aspect = Header File: `GPU_sprite.h` void GPU_sprite_begin(void); void GPU_sprite_end(void); `GPU_sprite_begin` will bot..."

2013-09-23T23:36:40Z

Created page with "= The Sprite Aspect = Header File: <tt>GPU_sprite.h</tt> <source lang="c"> void GPU_sprite_begin(void); void GPU_sprite_end(void); </source> <tt>GPU_sprite_begin</tt> will bot..."

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= The Sprite Aspect =

Header File: <tt>GPU_sprite.h</tt>

<source lang="c">
void GPU_sprite_begin(void);
void GPU_sprite_end(void);
</source>

<tt>GPU_sprite_begin</tt> will both switch to <tt>GPU_ASPECT_SPRITE</tt> and also prepares for <tt>GPU_sprite</tt> calls to be made.
<tt>GPU_sprite_end</tt> undoes this and switches back to <tt>GPU_ASPECT_BASIC</tt>.

Currently the appropriate <tt>GPU_immediate_format</tt> call must be made before any calls to <tt>GPU_sprite</tt> and
<tt>GPU_immediate_unformat</tt> should be called after all sprites are drawn. Since no emulation of point sprites is done on
systems that do not support it, no texture coordinate is required. ''This is subject to change.''

== Features ==

<source lang="c">
void GPU_point_size (float size);
void GPU_sprite_size(float size);
</source>

A distinction has to be made between ''points'' and ''sprites''.
The ''GPU_sprite_size'' function controls the size of sprites that are drawn using the <tt>GPU_ASPECT_SPRITE</tt>,
while <tt>GPU_point_size</tt> function controls the size of points that are drawn using <tt>POINT</tt> with any other aspect.

<source lang="c">
enum GPUSpriteShaderOption {
GPU_SPRITE_CIRCULAR = (1<<0),
GPU_SPRITE_TEXTURE_2D = (1<<1)
};

These options can be set on <tt>GPU_ASPECT_SPRITE</tt> by using <tt>GPU_aspect_enable(GPU_ASPECT_SPRITE, ...)</tt> and disabled by using <tt>GPU_aspect_disable(GPU_ASPECT_SPRITE, ...)</tt>.

<tt>GPU_SPRITE_CIRCULAR</tt> has the same effect as the legacy <tt>POINT_SMOOTH</tt>, that is, it makes points round.

<tt>GPU_SPRITE_TEXTURE_2D</tt> enables texture mapping and is not implemented yet.

</source>

== Issuing Sprites ==

<source lang="c">
void GPU_sprite_2f (float x, float y);
void GPU_sprite_2fv(const float v[2]);

void GPU_sprite_3f (float x, float y, float z);
void GPU_sprite_3fv(const float v[3]);
</source>

These functions act the same as <tt>Vertex</tt> in <tt>POINT</tt> mode and issue sprites to be drawn.

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利用者:Jwilkins/VFX/Aspects/Sprite - 版の履歴

Yamyam: 1版 をインポートしました

wiki>Jwilkins: Created page with "= The Sprite Aspect = Header File: GPU_sprite.h void GPU_sprite_begin(void); void GPU_sprite_end(void); GPU_sprite_begin will bot..."

Yamyam: 1版をインポートしました

wiki>Jwilkins: Created page with "= The Sprite Aspect = Header File: `GPU_sprite.h` void GPU_sprite_begin(void); void GPU_sprite_end(void); `GPU_sprite_begin` will bot..."