getColor

This function has two versions. getColor(vec2) and getColor(int ,vec2).

getColor(vec2)

Description :

• Get the color of inLayer in specified position.

Parameters :

• vec2 : uv position.

Return :

• vec4 : a RGBA color.

NOTE : We highly recommend using getColor(uv); to obtain pixels, we cannot guarantee that texture2d can return the right pixel.

getColor(int,vec2)

Description :

• Get the color of specified layer in specified position.

Parameters :

• int : layer id, -1 (or INPUT_LAYER_INDEX) means inLayer, number between 0 and 9 means the corresponding Layer Parameter in your plugin panel. (OUTPUT_LAYER_INDEX (which is -2) is provided in Lua render mode)
• vec2 : uv coordinates.

Return :

• vec4 : a RGBA color.

NOTE :

• So in other words, getColor(-1,uv); totally equals to getColor(uv);
• getColor(n,uv); can return the pixels of layer[n].