zeLight
Use .new("light") to create the object. An enabled light will
affect all objects after it in the tree of a scene structure unless the
node containing the light saves and restores OpenGL attributes of its
predecessor.
:set{...}
Sets light properties with a Lua table. Valid key-value pairs in the
Lua table are listed as follows.
| Key |
Value |
Type |
Remark |
| ambient |
{r, g, b, a} |
Numbers (0 to 1) in table |
Sets the ambient color of the light in red, green, blue ,and alpha. |
| diffuse |
{r, g, b, a} |
Numbers (0 to 1)in table |
Sets the diffuse color of the light in red, green, blue ,and alpha. |
| specular |
{r, g, b, a} |
Numbers (0 to 1) in table |
Sets the specular color of the light in red, green, blue ,and alpha. |
| attenuation |
{constant, linear, quadratic} |
Numbers in table |
Sets the constant, linear, and quadratic attenuation parameters
of the light. |
| local |
flag |
Boolean |
If true, sets the light as local; otherwise as directional (default). |
| lightmodel |
flag |
Boolean |
If true, uses ligh model; otherwise, use material color (default). |
| eye |
flag |
Boolean |
If true, sets the GL_LIGHT_MODEL_LOCAL_VIEWER parameter to 1; otherwise
to zero. |
| twoside |
flag |
Boolean |
Sets the GL_LIGHT_MODEL_TWO_SIDE parameter to 1; otherwise to 0. |
| spotdirection |
{x, y, z} |
Numbers in table |
Sets spot light direction. |
| spotexponent |
value |
Number |
Sets the intensity distribution of the spot light. |
| spotcutoff |
value |
Number |
Sets the cutoff angle (GL_SPOT_CUTOFF) of the spot light. |
| enable |
flag |
Boolean |
Enables (default) and disables the object |
| position |
{x, y, z} |
Numbers in table |
Sets the light postion. |
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