This page has been translated automatically.
Video Tutorials
Interface
Essentials
Advanced
How To
Professional (SIM)
UnigineEditor
Interface Overview
Assets Workflow
Settings and Preferences
Working With Projects
Adjusting Node Parameters
Setting Up Materials
Setting Up Properties
Lighting
Sandworm
Using Editor Tools for Specific Tasks
Extending Editor Functionality
Built-in Node Types
Nodes
Objects
Effects
Decals
Light Sources
Geodetics
World Nodes
Sound Objects
Pathfinding Objects
Players
Programming
Fundamentals
Setting Up Development Environment
Usage Examples
C++
C#
UnigineScript
UUSL (Unified UNIGINE Shader Language)
Plugins
File Formats
Materials and Shaders
Rebuilding the Engine Tools
GUI
Double Precision Coordinates
API
Containers
Common Functionality
Controls-Related Classes
Engine-Related Classes
Filesystem Functionality
GUI-Related Classes
Math Functionality
Node-Related Classes
Objects-Related Classes
Networking Functionality
Pathfinding-Related Classes
Physics-Related Classes
Plugins-Related Classes
IG Plugin
CIGIConnector Plugin
Rendering-Related Classes
Content Creation
Content Optimization
Materials
Material Nodes Library
Miscellaneous
Input
Math
Matrix
Textures
Art Samples
Tutorials
Warning! This version of documentation is OUTDATED, as it describes an older SDK version! Please switch to the documentation for the latest SDK version.
Warning! This version of documentation describes an old SDK version which is no longer supported! Please upgrade to the latest SDK version.

Unigine.WorldIntersectionTexCoord Class

This class stores the texture coordinates of the intersection point. You should use this class when you need additional information about the texture coordinates at the intersection point (it also stores the coordinates of the intersection, the index of the intersected triangle, the index of the intersected surface, and normal coordinates at the intersection point).

Usage Example#

The following example shows how you can get texture coordinates at the intersection point (vec4) 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.
Source code (C#)
/* ... */
// initialize points of the mouse direction
Vec3 p0, p1;

// get the current player (camera)
Player player = Game.Player;
if (player == null)
	return;

// get size (width and height) of the current application window
EngineWindow main_window = WindowManager.MainWindow;
if (!main_window)
	Engine.Quit();

ivec2 main_size = main_window.Size;

// get the current X and Y coordinates of the mouse pointer
int mouse_x = Input.MousePosition.x - main_window.Position.x;
int mouse_y = Input.MousePosition.y - main_window.Position.y;

// get the mouse direction from the player's position (p0) to the mouse cursor pointer (p1)
player.GetDirectionFromScreen(out p0, out p1, 0, 0, mouse_x, mouse_y, main_size.x, main_size.y);

// create an instance of the WorldIntersectionTextCoord class to get the result
WorldIntersectionTexCoord intersection = new WorldIntersectionTexCoord();

// create an instance for intersected object and check the intersection
Unigine.Object obj = World.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.NumSurfaces; i++)
	{
		obj.SetMaterialParameterFloat4("albedo_color", new vec4(1.0f, 0.0f, 0.0f, 1.0f),i);
		
		// show intersection details in console
		Log.Message("Texture coordinates ({0} {1} {2} {3})\n",
			intersection.TexCoord.x,
			intersection.TexCoord.y,
			intersection.TexCoord.z,
			intersection.TexCoord.w);
	}
}
/* ... */

WorldIntersectionTexCoord Class

Properties

vec4 TexCoord#

The Texture coordinates of the intersection point.

Members


WorldIntersectionTexCoord ( ) #

The WorldIntersectionTexCoord constructor.
Last update: 2022-12-14
Build: ()