d3d_light_define_direction(ind, dx, dy, dz, col)
| Argument | Description |
|---|---|
| ind | The index number of the light. |
| dx | The x component of the light vector. |
| dy | The y component of the light vector. |
| dz | The z component of the light vector. |
| col | The colour of the light. |
Returns: N/A
To use lighting you obviously need to define lights. In
GameMaker: Studio two different lights exist: directional
lights (like the sun), and positional lights. This function is for
a directional light, and the direction and intensity are set by the
values input for the x,y and z unit vector (meaning that they must
be between -1 and 1, where 1 or -1 is full intensity, and 0 is no
intensity). The lights can also be given a colour, which will also
affect the perceived intensity of the light as certain colours
appear "darker" than others. You must also give the light an index
number which what will be used in other functions to reference
it.
Note: There are only 8 hardware lights available, so you
should use these functions to define and manage "active" lights,
not all lights in the scene.
d3d_set_lighting(true);
d3d_light_define_direction(1, 0, 1, 0, c_white);
d3d_light_enable(1, true);
The above code will enable lighting for the whole scene, then define a white light and finally turn that light on.