Java Code Examples for com.badlogic.gdx.math.MathUtils#PI2

The following examples show how to use com.badlogic.gdx.math.MathUtils#PI2 . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: BulletFollowPathTest.java From gdx-ai with Apache License 2.0

6 votes

/** Creates a random path which is bound by rectangle described by the min/max values */
private static Array<Vector3> createRandomPath (int numWaypoints, float minX, float minY, float maxX, float maxY, float height) {
	Array<Vector3> wayPoints = new Array<Vector3>();

	float midX = (maxX + minX) / 2f;
	float midY = (maxY + minY) / 2f;

	float smaller = Math.min(midX, midY);

	float spacing = MathUtils.PI2 / numWaypoints;

	for (int i = 0; i < numWaypoints; i++) {
		float radialDist = MathUtils.random(smaller * 0.2f, smaller);
		tmpVector2.set(radialDist, 0.0f);

		// rotates the specified vector angle rads around the origin
		// init and rotate the transformation matrix
		tmpMatrix3.idt().rotateRad(i * spacing);
		// now transform the object's vertices
		tmpVector2.mul(tmpMatrix3);

		wayPoints.add(new Vector3(tmpVector2.x, height, tmpVector2.y));
	}

	return wayPoints;
}

Example 2

Source File: ShapeDrawerTest.java From shapedrawer with MIT License

6 votes

void refreshPolygonVertices() {
	if (2*sides!=vertices.length) vertices = new float[2*sides];
	srPreview.localToStageCoordinates(v.set(srPreview.getWidth(), srPreview.getHeight()).scl(0.5f));
	int srX = (int) v.x, srY = (int) v.y;
	preview.localToStageCoordinates(v.set(preview.getWidth(), preview.getHeight()).scl(0.5f));
	int X = (int) v.x, Y = (int) v.y;
	float angleInterval = MathUtils.PI2 / sides;
	float xRadius = anchor.dst(X, Y);
	float rotation = v.set(anchor).sub(X, Y).angleRad();
	float sin = (float) Math.sin(rotation), cos = (float) Math.cos(rotation);
	v2.set(1, 0);
	for (int i = 0; i < 2*sides; i+=2) {
		float x = v2.x*xRadius, y = v2.y*200;
		vertices[i] = x*cos-y*sin + srX;
		vertices[i+1] = x*sin+y*cos + srY;
		v2.rotateRad(angleInterval);
	}

	triangles = triangulator.computeTriangles(vertices);
}

Example 3

Source File: DefensiveCircleFormationPattern.java From gdx-ai with Apache License 2.0

6 votes

@Override
public Location<T> calculateSlotLocation (Location<T> outLocation, int slotNumber) {
	if (numberOfSlots > 1) {
		// Place the slot around the circle based on its slot number
		float angleAroundCircle = (MathUtils.PI2 * slotNumber) / numberOfSlots;

		// The radius depends on the radius of the member,
		// and the number of members in the circle:
		// we want there to be no gap between member's shoulders.
		float radius = memberRadius / (float)Math.sin(Math.PI / numberOfSlots);

		// Fill location components based on the angle around circle.
		outLocation.angleToVector(outLocation.getPosition(), angleAroundCircle).scl(radius);

		// The members should be facing out
		outLocation.setOrientation(angleAroundCircle);
	}
	else {
		outLocation.getPosition().setZero();
		outLocation.setOrientation(MathUtils.PI2 * slotNumber);
	}

	// Return the slot location
	return outLocation;
}

Example 4

Source File: BulletRaycastObstacleAvoidanceTest.java From gdx-ai with Apache License 2.0

6 votes

private void createWalls () {
	float side = 20; // Wall length
	int sides = MathUtils.random(4, 12);
	float angle = MathUtils.PI2 / sides;
	float radius = side / (2 * MathUtils.sin(MathUtils.PI / sides));
	float apothem = radius * MathUtils.cos(MathUtils.PI / sides);
	Vector3 v = new Vector3();
	for (int i = 0; i < sides; i++) {
		float a = angle * i;
		BulletSteeringUtils.angleToVector(v, a).scl(apothem);
		BulletEntity wall = world.add("staticwall", v.x, 0, v.z);
		wall.setColor(MathUtils.random(0.25f, 0.75f), MathUtils.random(0.25f, 0.75f), MathUtils.random(0.25f, 0.75f), 1f);
		wall.transform.rotateRad(Vector3.Y, a + MathUtils.PI / 2);
		wall.body.setWorldTransform(wall.transform);
	}
}

Example 5

Source File: MDQuaternion.java From Beginner-Level-Android-Studio-Apps with GNU General Public License v3.0

5 votes

/** Sets the quaternion components from the given axis and angle around that axis.
 * @param x X direction of the axis
 * @param y Y direction of the axis
 * @param z Z direction of the axis
 * @param radians The angle in radians
 * @return This quaternion for chaining. */
public void setFromAxisRad (final float x, final float y, final float z, final float radians) {
    float d = MDVector3D.len(x, y, z);
    if (d == 0f){
        idt();
        return;
    }

    d = 1f / d;
    float l_ang = radians < 0 ? MathUtils.PI2 - (-radians % MathUtils.PI2) : radians % MathUtils.PI2;
    float l_sin = (float) Math.sin(l_ang / 2);
    float l_cos = (float) Math.cos(l_ang / 2);
    this.set(l_cos, d * x * l_sin, d * y * l_sin, d * z * l_sin);
    this.nor();
}

Example 6

Source File: MDQuaternion.java From MD360Player4Android with Apache License 2.0

5 votes

/** Sets the quaternion components from the given axis and angle around that axis.
 * @param x X direction of the axis
 * @param y Y direction of the axis
 * @param z Z direction of the axis
 * @param radians The angle in radians
 * @return This quaternion for chaining. */
public void setFromAxisRad (final float x, final float y, final float z, final float radians) {
    float d = MDVector3D.len(x, y, z);
    if (d == 0f){
        idt();
        return;
    }

    d = 1f / d;
    float l_ang = radians < 0 ? MathUtils.PI2 - (-radians % MathUtils.PI2) : radians % MathUtils.PI2;
    float l_sin = (float)Math.sin(l_ang / 2);
    float l_cos = (float)Math.cos(l_ang / 2);
    this.set(l_cos, d * x * l_sin, d * y * l_sin, d * z * l_sin);
    this.nor();
}

Example 7