Unigine::GameIntersection Class
Header: | #include <UnigineGame.h> |
Stores the result of the Game::getIntersection() function: the point where the intersection with an obstacle has been occurred.
Usage Example#
The following example shows how you can get the intersection point (vec3) of the cylinder between two points with an obstacle. In this example we specify a cylinder from the point of the camera (vec3 p0) to the point of the mouse pointer (vec3 p1) with the specified radius. The executing sequence is the following:
- Define and initialize two points (p0 and p1) by using the Player::getDirectionFromScreen().
- Create an instance of the GameIntersection class to get the intersection point coordinates.
- Check, if there is an intersection with an obstacle. The Game::getIntersection() function returns an intersected obstacle when the obstacle appears in the area of the cylinder.
- After that GameIntersection instance gets the point of the nearest intersection point and you can get it by using the getPoint() function.
// AppWorldLogic.cpp
/* ... */
// initialize points of the mouse direction
Vec3 p0, p1;
// get the current player (camera)
PlayerPtr player = Game::get()->getPlayer();
if (player.get() == 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(p0,p1,mouse_x, mouse_y, width, height);
// create an instance of the GameIntersection class
GameIntersectionPtr intersection = GameIntersection::create();
// try to get the intersection with an obstacle
// cylinder has radius 1.5f, intersection mask equals to 1
ObstaclePtr obstacle = Game::get()->getIntersection(p0, p1, 1.5f, 1, intersection);
// check, if the intersection of mouse direction with any obstacle was occurred;
if (obstacle)
{
// show the coordinates of the intersection in console
Log::message("The intersection with the obstacle was here: (%f %f %f)\n", intersection->getPoint().x, intersection->getPoint().y, intersection->getPoint().z);
}
/* ... */
GameIntersection Class
Members
static GameIntersectionPtr create ( )
The GameIntersection constructor.void setPoint( const Math::Vec3 & point )
Sets new coordinates of the intersection point.Arguments
- const Math::Vec3 & point - Coordinates of the intersection point.
Math::Vec3 getPoint( )
Returns coordinates of the intersection point.Return value
Coordinates of the intersection point.Last update:
27.12.2018
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