Difference between revisions of "LlSetAlpha"
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(Add Blinn-Phong terminology to page following PBR release.) |
Tapple Gao (talk | contribs) (add caveats about PBR) |
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|spec | |spec | ||
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* llSetAlpha will have no visible effect on faces with a PBR material. To work on faces both with and without a PBR material, use one of these snippets: | |||
** invisible <source lang="lsl2"> | |||
llSetAlpha(0.0, ALL_SIDES); | |||
llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_GLTF_BASE_COLOR, ALL_SIDES, "", "", "", "", "", "", "", "", ""]); | |||
</source> | |||
** visible <source lang="lsl2"> | |||
llSetAlpha(1.0, ALL_SIDES); | |||
llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_GLTF_BASE_COLOR, ALL_SIDES, "", "", "", "", "", 0.0, PRIM_GLTF_ALPHA_MODE_MASK, 1.0, ""]); | |||
</source> | |||
|constants | |constants | ||
|examples=<source lang="lsl2"> | |examples=<source lang="lsl2"> | ||
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{{LSL DefineRow||[[llSetLinkColor]]|Sets link's color}} | {{LSL DefineRow||[[llSetLinkColor]]|Sets link's color}} | ||
{{LSL DefineRow||[[llSetLinkAlpha]]|Sets link's alpha}} | {{LSL DefineRow||[[llSetLinkAlpha]]|Sets link's alpha}} | ||
{{LSL DefineRow||[[PRIM_COLOR]]|The equivilant parameter for [[llSetPrimitiveParams]]}} | |||
{{LSL DefineRow||[[PRIM_GLTF_BASE_COLOR]]|The equivilant PBR parameter for [[llSetPrimitiveParams]]}} | |||
|also_tests | |also_tests | ||
|also_events= | |also_events= | ||
Revision as of 15:15, 11 December 2024
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: llSetAlpha( float alpha, integer face );| 0.0 | Forced Delay |
| 10.0 | Energy |
Sets the Blinn-Phong alpha on face
| • float | alpha | – | from 0.0 (clear) to 1.0 (solid) (0.0 <= alpha <= 1.0) | |
| • integer | face | – | face number or ALL_SIDES |
If face is ALL_SIDES then the function works on all sides.
Caveats
- The function silently fails if its face value indicates a face that does not exist.
- llSetAlpha will have no visible effect on faces with a PBR material. To work on faces both with and without a PBR material, use one of these snippets:
- invisible
llSetAlpha(0.0, ALL_SIDES); llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_GLTF_BASE_COLOR, ALL_SIDES, "", "", "", "", "", "", "", "", ""]);
- visible
llSetAlpha(1.0, ALL_SIDES); llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_GLTF_BASE_COLOR, ALL_SIDES, "", "", "", "", "", 0.0, PRIM_GLTF_ALPHA_MODE_MASK, 1.0, ""]);
- invisible
Examples
float cloakSpeed = 0.1;
default
{
touch_end(integer total_number)
{
float alpha = 1.0;
while(alpha > 0.0)
{
alpha -= 0.1;
llSetAlpha(alpha, ALL_SIDES);
llSleep(cloakSpeed);
}
state cloaked;
}
}
state cloaked
{
touch_end(integer total_number)
{
float alpha;
while (alpha < 1.0)
{
alpha += 0.1;
llSetAlpha(alpha, ALL_SIDES);
llSleep(cloakSpeed);
}
state default;
}
}
Notes
In practical terms, "alpha" means "transparency" or "visibility".
To be clear, llSetAlpha will only affect the prim that the script it is in. It will not affect any linked prims. To set the alpha state for those, use llSetLinkAlpha
See Also
Events
| • | changed | – | CHANGED_COLOR |
Functions
| • | llGetAlpha | – | Gets the prim's alpha | |
| • | llGetColor | – | Gets the prim's color | |
| • | llSetColor | – | Sets the prim's color | |
| • | llSetLinkColor | – | Sets link's color | |
| • | llSetLinkAlpha | – | Sets link's alpha | |
| • | PRIM_COLOR | – | The equivilant parameter for llSetPrimitiveParams | |
| • | PRIM_GLTF_BASE_COLOR | – | The equivilant PBR parameter for llSetPrimitiveParams |
Articles
| • | Translucent Color |
Deep Notes
Signature |
|---|
function void llSetAlpha( float alpha, integer face ); |