Unigine.WorldIntersectionTexCoord Class
Inherits: | WorldIntersectionNormal |
This class stores the texture coordinates of the intersection point. You should use this class when you need only the texture coordinates of the intersection.
Usage Example
The following example shows how you can get the intersection normal (vec3) by using the WorldIntersectionTexCoord class. In this example the line is an invisible traced line from the point of the camera (vec3 p0) to the point of the mouse pointer (vec3 p1). The executing sequence is the following:
- Define and initialize two points (p0 and p1) by using the Player.getDirectionFromScreen()> function.
- Create an instance of the WorldIntersectionTexCoord class to get the intersection information.
- Check, if there is a intersection with an object. The World.getIntersection() function returns an intersected object when the object intersects with the traced line.
- In this example, when the object intersects with the traced line, all the surfaces of the intersected object change their material parameters. The WorldIntersectionTexCoord class instance gets the texture coordinates of the intersection point. You can get the texture coordinates by using the getTexCoord() function.
/* ... */
// initialize points of the mouse direction
Vec3 p0,p1;
// get the current player (camera)
Player player = Game.get().getPlayer();
if (player == null)
return 0;
// get width and height of the current application window
int width = App.get().getWidth();
int height = App.get().getHeight();
// get the current X and Y coordinates of the mouse pointer
int mouse_x = App.get().getMouseX();
int mouse_y = App.get().getMouseY();
// get the mouse direction from the player's position (p0) to the mouse cursor pointer (p1)
player.getDirectionFromScreen(out p0, out p1, mouse_x, mouse_y, width, height);
// create an instance of the WorldIntersectionNormal class to get the result
WorldIntersectionTexCoord intersection = new WorldIntersectionTexCoord();
// create an instance for intersected object and check the intersection
Unigine.Object obj = World.get().getIntersection(p0,p1,1,intersection);
// if the intersection has been occurred, change the parameter of the object's material
if(obj != null)
{
for (int i = 0; i < obj.getNumSurfaces(); i++)
{
obj.setMaterialParameter("albedo_color", new vec4(1.0f, 0.0f, 0.0f, 1.0f),i);
// show intersection details in console
Log.message("Texture coordinates ({1} {2} {3})\n",
intersection.getTexCoord().x,
intersection.getTexCoord().y,
intersection.getTexCoord().z,
intersection.getTexCoord().w);
}
}
/* ... */
WorldIntersectionTexCoord Class
Members
static WorldIntersectionTexCoord()
The WorldIntersectionTexCoord constructor.void setTexCoord(vec4 coord)
Sets new texture coordinates of the intersection point.Arguments
- vec4 coord - Texture coordinates of the intersection point.
vec4 getTexCoord()
Returns texture coordinates of the intersection point.Return value
Texture coordinates of the intersection point (where vec4.xy is for the first UV channel, vec4.zw is for the second UV channel).Last update: 2018-08-10
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