Difference between revisions of "PixelEffect:send"

(Created page with "{{newin|0.8.0|080|type=function}} Sends one or more values to a pixel effect using the specified name. This function allows certain aspects of a pixel effect to be controlle...")
 
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{{newin|[[0.8.0]]|080|type=function}}
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{{newinoldin|[[0.8.0]]|080|[[0.9.0]]|090|type=function|text=It has been renamed to [[Shader:send]]}}
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Sends one or more values to a pixel effect using the specified name.
+
Sends one or more values to a special (''extern'') variable inside the pixel effect. Extern variables have to be marked using the ''extern'' keyword, e.g.
  
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This function allows certain aspects of a pixel effect to be controlled by Lua code.
+
<source lang="glsl">
 +
extern number time;
 +
extern vec2 light_pos;
 +
extern vec4 colors[4];
 +
</source>
 +
 
 +
The corresponding send calls would be
 +
 
 +
<source lang="lua">
 +
effect:send("time", t)
 +
effect:send("light_pos", {light_x, light_y})
 +
effect:send("colors", {r1, g1, b1, a1},  {r2, g2, b2, a2},  {r3, g3, b3, a3},  {r4, g4, b4, a4})
 +
</source>
  
 
== Function ==
 
== Function ==
 
=== Synopsis ===
 
=== Synopsis ===
 
<source lang="lua">
 
<source lang="lua">
−
PixelEffect:send( name, number )
+
PixelEffect:send( name, number, ... )
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
 
{{param|string|name|Name of the number to send to the pixel effect.}}
 
{{param|string|name|Name of the number to send to the pixel effect.}}
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{{param|number|number|Number to send to the pixel effect.}}
+
{{param|number|number|Number to send to store in the extern.}}
 +
{{param|number|...|Additional numbers to send in case the extern is an array.}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
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=== Synopsis ===
 
=== Synopsis ===
 
<source lang="lua">
 
<source lang="lua">
−
PixelEffect:send( name, ... )
+
PixelEffect:send( name, vector, ... )
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
−
{{param|string|name|Name of the numbers to send to the pixel effect.}}
+
{{param|string|name|Name of the vector to send to the pixel effect.}}
−
{{param|number|...|Numbers to send to the pixel effect as a vector. Up to four can be sent. Values can also be packed into a table.}}
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{{param|table|vector|Numbers to send to the extern as a vector. The number of elements in the table determines the type of the vector (e.g. two numbers -> vec2). At least two and at most four numbers can be used.}}
 +
{{param|table|...|Additional vectors to send in case the extern is an array. All vectors need to be of the same size (e.g. only vec3's)}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
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=== Synopsis ===
 
=== Synopsis ===
 
<source lang="lua">
 
<source lang="lua">
−
PixelEffect:send( name, matrix )
+
PixelEffect:send( name, matrix, ... )
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
 
{{param|string|name|Name of the matrix to send to the pixel effect.}}
 
{{param|string|name|Name of the matrix to send to the pixel effect.}}
−
{{param|table|matrix|2x2, 3x3, or 4x4 matrix to send to the pixel effect. Using table form: <nowiki>{{a,b,c,d}, {e,f,g,h}, ... }</nowiki>}}
+
{{param|table|matrix|2x2, 3x3, or 4x4 matrix to send to the extern. Using table form: <code><nowiki>{{a,b,c,d}, {e,f,g,h}, ... }</nowiki></code>}}
 +
{{param|table|...|Additional matrices of the same type as ''matrix'' to store in the extern array.}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
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=== Synopsis ===
 
=== Synopsis ===
 
<source lang="lua">
 
<source lang="lua">
−
PixelEffect:send( name, image )
+
PixelEffect:send( name, image, ... )
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
 
{{param|string|name|Name of the Image to send to the pixel effect.}}
 
{{param|string|name|Name of the Image to send to the pixel effect.}}
−
{{param|Image|image|Image to send to the pixel effect for use as extra data.}}
+
{{param|Image|image|Image to send to the extern.}}
 +
{{param|Image|...|Additional images in case the extern is an array.}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
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=== Synopsis ===
 
=== Synopsis ===
 
<source lang="lua">
 
<source lang="lua">
−
PixelEffect:send( name, canvas )
+
PixelEffect:send( name, canvas, ... )
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
 
{{param|string|name|Name of the Canvas to send to the pixel effect.}}
 
{{param|string|name|Name of the Canvas to send to the pixel effect.}}
−
{{param|Canvas|canvas|Canvas to send to the pixel effect for use as extra data.}}
+
{{param|Canvas|canvas|Canvas to send to the extern. The pixel effect type is ''Image''.}}
 +
{{param|Image|...|Additional canvases to send to the extern array.}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
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* [[parent::PixelEffect]]
 
* [[parent::PixelEffect]]
 
[[Category:Functions]]
 
[[Category:Functions]]
−
{{#set:Description=Sends one or more values to a pixel effect.}}
+
{{#set:Description=Sends one or more values to the pixel effect.}}
 
== Other Languages ==
 
== Other Languages ==
 
{{i18n|PixelEffect:send}}
 
{{i18n|PixelEffect:send}}

Latest revision as of 10:25, 1 January 2019

Available since LÖVE 0.8.0 and removed in LÖVE 0.9.0
It has been renamed to Shader:send.

Sends one or more values to a special (extern) variable inside the pixel effect. Extern variables have to be marked using the extern keyword, e.g. 

extern number time;
extern vec2 light_pos;
extern vec4 colors[4];

The corresponding send calls would be 

effect:send("time", t)
effect:send("light_pos", {light_x, light_y})
effect:send("colors", {r1, g1, b1, a1},  {r2, g2, b2, a2},  {r3, g3, b3, a3},  {r4, g4, b4, a4})

Function

Synopsis

PixelEffect:send( name, number, ... )

Arguments

string name
Name of the number to send to the pixel effect.
number number
Number to send to store in the extern.
number ...
Additional numbers to send in case the extern is an array.

Returns

Nothing.

Function

Synopsis

PixelEffect:send( name, vector, ... )

Arguments

string name
Name of the vector to send to the pixel effect.
table vector
Numbers to send to the extern as a vector. The number of elements in the table determines the type of the vector (e.g. two numbers -> vec2). At least two and at most four numbers can be used.
table ...
Additional vectors to send in case the extern is an array. All vectors need to be of the same size (e.g. only vec3's)

Returns

Nothing.

Function

Synopsis

PixelEffect:send( name, matrix, ... )

Arguments

string name
Name of the matrix to send to the pixel effect.
table matrix
2x2, 3x3, or 4x4 matrix to send to the extern. Using table form: {{a,b,c,d}, {e,f,g,h}, ... }
table ...
Additional matrices of the same type as matrix to store in the extern array.

Returns

Nothing.

Function

Synopsis

PixelEffect:send( name, image, ... )

Arguments

string name
Name of the Image to send to the pixel effect.
Image image
Image to send to the extern.
Image ...
Additional images in case the extern is an array.

Returns

Nothing.

Function

Synopsis

PixelEffect:send( name, canvas, ... )

Arguments

string name
Name of the Canvas to send to the pixel effect.
Canvas canvas
Canvas to send to the extern. The pixel effect type is Image.
Image ...
Additional canvases to send to the extern array.

Returns

Nothing.

See Also

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