com.badlogic.gdx.graphics.VertexAttribute Java Examples

public Renderer20 (int maxVertices, boolean hasNormals, boolean hasColors, int numTexCoords, ShaderProgram shader) {
	this.maxVertices = maxVertices;
	this.numTexCoords = numTexCoords;
	this.shader = shader;

	VertexAttribute[] attribs = buildVertexAttributes(hasNormals, hasColors, numTexCoords);
	mesh = new Mesh(false, maxVertices, 0, attribs);

	vertices = new float[maxVertices * (mesh.getVertexAttributes().vertexSize / 4)];
	vertexSize = mesh.getVertexAttributes().vertexSize / 4;
	normalOffset = mesh.getVertexAttribute(Usage.Normal) != null ? mesh.getVertexAttribute(Usage.Normal).offset / 4 : 0;
	colorOffset = mesh.getVertexAttribute(Usage.ColorPacked) != null ? mesh.getVertexAttribute(Usage.ColorPacked).offset / 4
		: 0;
	texCoordOffset = mesh.getVertexAttribute(Usage.TextureCoordinates) != null ? mesh
		.getVertexAttribute(Usage.TextureCoordinates).offset / 4 : 0;
}
 

public static String morphTargetsPrefix(Renderable renderable){
	String prefix = "";
	// TODO optimize double loop
	for(VertexAttribute att : renderable.meshPart.mesh.getVertexAttributes()){
		for(int i=0 ; i<PBRCommon.MAX_MORPH_TARGETS ; i++){
			if(att.usage == PBRVertexAttributes.Usage.PositionTarget && att.unit == i){
				prefix += "#define " + "position" + i + "Flag\n";
			}else if(att.usage == PBRVertexAttributes.Usage.NormalTarget && att.unit == i){
				prefix += "#define " + "normal" + i + "Flag\n";
			}else if(att.usage == PBRVertexAttributes.Usage.TangentTarget && att.unit == i){
				prefix += "#define " + "tangent" + i + "Flag\n";
			}
		}
	}
	return prefix;
}
 

PositionalLight( RayHandler rayHandler, int rays, Color color, float distance, float x, float y, float directionDegree ) {
	super( rayHandler, rays, color, directionDegree, distance );
	start.x = x;
	start.y = y;
	sin = new float[ rays ];
	cos = new float[ rays ];
	endX = new float[ rays ];
	endY = new float[ rays ];

	lightMesh = new Mesh( VertexDataType.VertexArray, staticLight, vertexNum, 0, new VertexAttribute( Usage.Position, 2,
			"vertex_positions" ), new VertexAttribute( Usage.ColorPacked, 4, "quad_colors" ), new VertexAttribute(
			Usage.Generic, 1, "s" ) );
	softShadowMesh = new Mesh( VertexDataType.VertexArray, staticLight, vertexNum * 2, 0, new VertexAttribute(
			Usage.Position, 2, "vertex_positions" ), new VertexAttribute( Usage.ColorPacked, 4, "quad_colors" ),
			new VertexAttribute( Usage.Generic, 1, "s" ) );

	setMesh();
}
 

private static VertexAttribute[] createVertexAttributes (boolean hasNormals, int uvs) {
	VertexAttribute[] attributes = new VertexAttribute[1 + (hasNormals ? 1 : 0) + uvs];
	int idx = 0;
	attributes[idx++] = new VertexAttribute(Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE);
	if (hasNormals) attributes[idx++] = new VertexAttribute(Usage.Normal, 3, ShaderProgram.NORMAL_ATTRIBUTE);
	for (int i = 0; i < uvs; i++) {
		attributes[idx++] = new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + i);
	}
	return attributes;
}
 

private Mesh createFullscreenQuad() {
	// vertex coord
	verts[X1] = -1;
	verts[Y1] = -1;

	verts[X2] = 1;
	verts[Y2] = -1;

	verts[X3] = 1;
	verts[Y3] = 1;

	verts[X4] = -1;
	verts[Y4] = 1;

	// tex coords
	verts[U1] = 0f;
	verts[V1] = 0f;

	verts[U2] = 1f;
	verts[V2] = 0f;

	verts[U3] = 1f;
	verts[V3] = 1f;

	verts[U4] = 0f;
	verts[V4] = 1f;

	Mesh tmpMesh = new Mesh( VertexDataType.VertexArray, true, 4, 0, new VertexAttribute( Usage.Position, 2, "a_position" ),
			new VertexAttribute( Usage.TextureCoordinates, 2, "a_texCoord0" ) );

	tmpMesh.setVertices( verts );
	return tmpMesh;
}
 

private VertexAttribute[] parseAttributes (JsonValue attributes) {
	Array<VertexAttribute> vertexAttributes = new Array<VertexAttribute>();
	int unit = 0;
	int blendWeightCount = 0;
	for (JsonValue value = attributes.child; value != null; value = value.next) {
		String attribute = value.asString();
		String attr = (String)attribute;
		if (attr.equals("POSITION")) {
			vertexAttributes.add(VertexAttribute.Position());
		} else if (attr.equals("NORMAL")) {
			vertexAttributes.add(VertexAttribute.Normal());
		} else if (attr.equals("COLOR")) {
			vertexAttributes.add(VertexAttribute.ColorUnpacked());
		} else if (attr.equals("COLORPACKED")) {
			vertexAttributes.add(VertexAttribute.Color());
		} else if (attr.equals("TANGENT")) {
			vertexAttributes.add(VertexAttribute.Tangent());
		} else if (attr.equals("BINORMAL")) {
			vertexAttributes.add(VertexAttribute.Binormal());
		} else if (attr.startsWith("TEXCOORD")) {
			vertexAttributes.add(VertexAttribute.TexCoords(unit++));
		} else if (attr.startsWith("BLENDWEIGHT")) {
			vertexAttributes.add(VertexAttribute.BoneWeight(blendWeightCount++));
		} else {
			throw new GdxRuntimeException("Unknown vertex attribute '" + attr
					+ "', should be one of position, normal, uv, tangent or binormal");
		}
	}
	return vertexAttributes.toArray(VertexAttribute.class);
}
 

private VertexAttribute[] buildVertexAttributes (boolean hasNormals, boolean hasColor, int numTexCoords) {
	Array<VertexAttribute> attribs = new Array<VertexAttribute>();
	attribs.add(new VertexAttribute(Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE));
	if (hasNormals) attribs.add(new VertexAttribute(Usage.Normal, 3, ShaderProgram.NORMAL_ATTRIBUTE));
	if (hasColor) attribs.add(new VertexAttribute(Usage.ColorPacked, 4, ShaderProgram.COLOR_ATTRIBUTE));
	for (int i = 0; i < numTexCoords; i++) {
		attribs.add(new VertexAttribute(Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + i));
	}
	VertexAttribute[] array = new VertexAttribute[attribs.size];
	for (int i = 0; i < attribs.size; i++)
		array[i] = attribs.get(i);
	return array;
}
 

private Mesh createLightMapMesh() {
	float[] verts = new float[VERT_SIZE];
	// vertex coord
	verts[X1] = -1;
	verts[Y1] = -1;

	verts[X2] = 1;
	verts[Y2] = -1;

	verts[X3] = 1;
	verts[Y3] = 1;

	verts[X4] = -1;
	verts[Y4] = 1;

	// tex coords
	verts[U1] = 0f;
	verts[V1] = 0f;

	verts[U2] = 1f;
	verts[V2] = 0f;

	verts[U3] = 1f;
	verts[V3] = 1f;

	verts[U4] = 0f;
	verts[V4] = 1f;

	Mesh tmpMesh = new Mesh(true, 4, 0, new VertexAttribute(
			Usage.Position, 2, "a_position"), new VertexAttribute(
			Usage.TextureCoordinates, 2, "a_texCoord"));

	tmpMesh.setVertices(verts);
	return tmpMesh;

}
 

/**
 * Creates directional light which source is at infinite distance,
 * direction and intensity is same everywhere
 * 
 * <p>-90 direction is straight from up
 * 
 * @param rayHandler
 *            not {@code null} instance of RayHandler
 * @param rays
 *            number of rays - more rays make light to look more realistic
 *            but will decrease performance, can't be less than MIN_RAYS
 * @param color
 *            color, set to {@code null} to use the default color
 * @param directionDegree
 *            direction in degrees
 */
public DirectionalLight(RayHandler rayHandler, int rays, Color color,
		float directionDegree) {
	
	super(rayHandler, rays, color, Float.POSITIVE_INFINITY, directionDegree);
	
	vertexNum = (vertexNum - 1) * 2;
	start = new Vector2[rayNum];
	end = new Vector2[rayNum];
	for (int i = 0; i < rayNum; i++) {
		start[i] = new Vector2();
		end[i] = new Vector2();
	}
	
	lightMesh = new Mesh(
			VertexDataType.VertexArray, staticLight, vertexNum, 0,
			new VertexAttribute(Usage.Position, 2, "vertex_positions"),
			new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
			new VertexAttribute(Usage.Generic, 1, "s"));
	softShadowMesh = new Mesh(
			VertexDataType.VertexArray, staticLight, vertexNum, 0,
			new VertexAttribute(Usage.Position, 2, "vertex_positions"),
			new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
			new VertexAttribute(Usage.Generic, 1, "s"));
	
	update();
}
 

/**
 * Creates chain light from specified vertices
 * 
 * @param rayHandler
 *            not {@code null} instance of RayHandler
 * @param rays
 *            number of rays - more rays make light to look more realistic
 *            but will decrease performance, can't be less than MIN_RAYS
 * @param color
 *            color, set to {@code null} to use the default color
 * @param distance
 *            distance of light
 * @param rayDirection
 *            direction of rays
 *            <ul>
 *            <li>1 = left</li>
 *            <li>-1 = right</li>
 *            </ul>
 * @param chain
 *            float array of (x, y) vertices from which rays will be
 *            evenly distributed
 */
public ChainLight(RayHandler rayHandler, int rays, Color color,
		float distance, int rayDirection, float[] chain) {
	
	super(rayHandler, rays, color, distance, 0f);
	rayStartOffset = ChainLight.defaultRayStartOffset;
	this.rayDirection = rayDirection;
	vertexNum = (vertexNum - 1) * 2;
	endX = new float[rays];
	endY = new float[rays];
	startX = new float[rays];
	startY = new float[rays];
	this.chain = (chain != null) ?
				 new FloatArray(chain) : new FloatArray();
	
	lightMesh = new Mesh(
			VertexDataType.VertexArray, false, vertexNum, 0,
			new VertexAttribute(Usage.Position, 2, "vertex_positions"),
			new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
			new VertexAttribute(Usage.Generic, 1, "s"));
	softShadowMesh = new Mesh(
			VertexDataType.VertexArray, false, vertexNum * 2,
			0, new VertexAttribute(Usage.Position, 2, "vertex_positions"),
			new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
			new VertexAttribute(Usage.Generic, 1, "s"));
	setMesh();
}
 

private VertexAttribute[] parseAttributes(JsonValue attributes) {
    Array<VertexAttribute> vertexAttributes = new Array<VertexAttribute>();
    int unit = 0;
    int blendWeightCount = 0;
    for (JsonValue value = attributes.child; value != null; value = value.next) {
        String attribute = value.asString();
        String attr = (String) attribute;
        if (attr.equals("POSITION")) {
            vertexAttributes.add(VertexAttribute.Position());
        } else if (attr.equals("NORMAL")) {
            vertexAttributes.add(VertexAttribute.Normal());
        } else if (attr.equals("COLOR")) {
            vertexAttributes.add(VertexAttribute.ColorUnpacked());
        } else if (attr.equals("COLORPACKED")) {
            vertexAttributes.add(VertexAttribute.ColorPacked());
        } else if (attr.equals("TANGENT")) {
            vertexAttributes.add(VertexAttribute.Tangent());
        } else if (attr.equals("BINORMAL")) {
            vertexAttributes.add(VertexAttribute.Binormal());
        } else if (attr.startsWith("TEXCOORD")) {
            vertexAttributes.add(VertexAttribute.TexCoords(unit++));
        } else if (attr.startsWith("BLENDWEIGHT")) {
            vertexAttributes.add(VertexAttribute.BoneWeight(blendWeightCount++));
        } else {
            throw new GdxRuntimeException("Unknown vertex attribute '" + attr
                    + "', should be one of position, normal, uv, tangent or binormal");
        }
    }
    return vertexAttributes.toArray(VertexAttribute.class);
}
 

private Mesh createLightMapMesh() {
	// vertex coord
	verts[X1] = -1;
	verts[Y1] = -1;

	verts[X2] = 1;
	verts[Y2] = -1;

	verts[X3] = 1;
	verts[Y3] = 1;

	verts[X4] = -1;
	verts[Y4] = 1;

	// tex coords
	verts[U1] = 0f;
	verts[V1] = 0f;

	verts[U2] = 1f;
	verts[V2] = 0f;

	verts[U3] = 1f;
	verts[V3] = 1f;

	verts[U4] = 0f;
	verts[V4] = 1f;

	Mesh tmpMesh = new Mesh( true, 4, 0, new VertexAttribute( Usage.Position, 2, "a_position" ), new VertexAttribute(
			Usage.TextureCoordinates, 2, "a_texCoord" ) );

	tmpMesh.setVertices( verts );
	return tmpMesh;

}
 

/**
 * Directional lights simulate light source that locations is at infinite
 * distance. Direction and intensity is same everywhere. -90 direction is
 * straight from up.
 * 
 * @param rayHandler
 * @param rays
 * @param color
 * @param directionDegree
 */
public DirectionalLight( RayHandler rayHandler, int rays, Color color, float directionDegree ) {

	super( rayHandler, rays, color, directionDegree, Float.POSITIVE_INFINITY );

	vertexNum = (vertexNum - 1) * 2;

	start = new Vector2[ rayNum ];
	end = new Vector2[ rayNum ];
	for( int i = 0; i < rayNum; i++ ) {
		start[i] = new Vector2();
		end[i] = new Vector2();
	}
	setDirection( direction );

	// lightMesh = new Mesh(staticLight, vertexNum, 0, new VertexAttribute(
	// Usage.Position, 2, "vertex_positions"), new VertexAttribute(
	// Usage.ColorPacked, 4, "quad_colors"), new VertexAttribute(
	// Usage.Generic, 1, "s"));
	//
	// softShadowMesh = new Mesh(staticLight, vertexNum, 0,
	// new VertexAttribute(Usage.Position, 2, "vertex_positions"),
	// new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
	// new VertexAttribute(Usage.Generic, 1, "s"));

	lightMesh = new Mesh( VertexDataType.VertexArray, staticLight, vertexNum, 0, new VertexAttribute( Usage.Position, 2,
			"vertex_positions" ), new VertexAttribute( Usage.ColorPacked, 4, "quad_colors" ), new VertexAttribute(
			Usage.Generic, 1, "s" ) );

	softShadowMesh = new Mesh( VertexDataType.VertexArray, staticLight, vertexNum, 0, new VertexAttribute( Usage.Position, 2,
			"vertex_positions" ), new VertexAttribute( Usage.ColorPacked, 4, "quad_colors" ), new VertexAttribute(
			Usage.Generic, 1, "s" ) );

	update();
}
 

private void createBackPlane () {
	plane = new Mesh(true, 4, 4, new VertexAttribute(Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE),
		new VertexAttribute(Usage.Normal, 3, ShaderProgram.NORMAL_ATTRIBUTE));

	// @formatter:off
	float size = 10f;
	float verts[] = {-size / 2, 0, size / 2, size / 2, 0, size / 2, size / 2, 0, -size / 2, -size / 2, 0, -size / 2};
	// float verts[] = {size, 0, size, size, 0, 0, 0, 0, 0, 0, 0, size};

	float normals[] = {0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0};
	// @formatter:on

	int vidx = 0, nidx = 0;
	int length = 6 * 4;
	float[] vertices = new float[length];
	for (int i = 0; i < length;) {
		vertices[i++] = verts[vidx++];
		vertices[i++] = verts[vidx++];
		vertices[i++] = verts[vidx++];
		vertices[i++] = normals[nidx++];
		vertices[i++] = normals[nidx++];
		vertices[i++] = normals[nidx++];
	}

	plane.setVertices(vertices);
	plane.setIndices(new short[] {0, 1, 2, 3});
}
 

private Mesh createFullscreenQuad () {
	// vertex coord
	verts[X1] = -1;
	verts[Y1] = -1;

	verts[X2] = 1;
	verts[Y2] = -1;

	verts[X3] = 1;
	verts[Y3] = 1;

	verts[X4] = -1;
	verts[Y4] = 1;

	// tex coords
	verts[U1] = 0f;
	verts[V1] = 0f;

	verts[U2] = 1f;
	verts[V2] = 0f;

	verts[U3] = 1f;
	verts[V3] = 1f;

	verts[U4] = 0f;
	verts[V4] = 1f;

	Mesh tmpMesh = new Mesh(VertexDataType.VertexArray, true, 4, 0, new VertexAttribute(Usage.Position, 2, "a_position"),
		new VertexAttribute(Usage.TextureCoordinates, 2, "a_texCoord0"));

	tmpMesh.setVertices(verts);
	return tmpMesh;
}
 

protected long computeMorphTargetsMask(Renderable renderable){
	int morphTargetsFlag = 0;
	VertexAttributes vertexAttributes = renderable.meshPart.mesh.getVertexAttributes();
	final int n = vertexAttributes.size();
	for (int i = 0; i < n; i++) {
		final VertexAttribute attr = vertexAttributes.get(i);
		if (attr.usage == PBRVertexAttributes.Usage.PositionTarget) morphTargetsFlag |= (1 << attr.unit);
	}
	return morphTargetsFlag;
}
 

public long computeMorphTargetsMask(Renderable renderable){
	int morphTargetsFlag = 0;
	VertexAttributes vertexAttributes = renderable.meshPart.mesh.getVertexAttributes();
	final int n = vertexAttributes.size();
	for (int i = 0; i < n; i++) {
		final VertexAttribute attr = vertexAttributes.get(i);
		if (attr.usage == PBRVertexAttributes.Usage.PositionTarget) morphTargetsFlag |= (1 << attr.unit);
		if (attr.usage == PBRVertexAttributes.Usage.NormalTarget) morphTargetsFlag |= (1 << (attr.unit + 8));
		if (attr.usage == PBRVertexAttributes.Usage.TangentTarget) morphTargetsFlag |= (1 << (attr.unit + 16));
	}
	return morphTargetsFlag;
}
 

private int computeVertexColorLayers(Renderable renderable) {
	int num = 0;
	VertexAttributes vertexAttributes = renderable.meshPart.mesh.getVertexAttributes();
	final int n = vertexAttributes.size();
	for (int i = 0; i < n; i++) {
		final VertexAttribute attr = vertexAttributes.get(i);
		if (attr.usage == VertexAttributes.Usage.ColorUnpacked) num++;
	}
	return num;
}
 

protected String morphTargetsPrefix(Renderable renderable){
	String prefix = "";
	for(VertexAttribute att : renderable.meshPart.mesh.getVertexAttributes()){
		for(int i=0 ; i<PBRCommon.MAX_MORPH_TARGETS ; i++){
			if(att.usage == PBRVertexAttributes.Usage.PositionTarget && att.unit == i){
				prefix += "#define " + "position" + i + "Flag\n";
			}
		}
	}
	return prefix;
}
 

private Mesh buildMeshFromVerticesAndTexCoords(List<Double> vertexCoords, List<Double> texCoords) {
  if ((vertexCoords.size() % 3) != 0) {
    throw new RuntimeException("Vertex coordinates size is " + vertexCoords.size() + "; must be a multiple of 3");
  }
  if ((texCoords.size() % 2) != 0) {
    throw new RuntimeException("Texture coordinates size is " + texCoords.size() + "; must be a multiple of 2");
  }
  if (vertexCoords.size() / 3 != texCoords.size() / 2) {
    throw new RuntimeException("There is vertex data for " + vertexCoords.size() / 3 + " triangle(s), "
            + "and texture data for " + texCoords.size() / 2 + " triangle(s) -- these should match");
  }

  float[] data = new float[vertexCoords.size() + texCoords.size()];
  int vertexIndex = 0;
  int texIndex = 0;
  int dataIndex = 0;
  for (int i = 0; i < vertexCoords.size() / 3; i++) {
    data[dataIndex++] = (float) vertexCoords.get(vertexIndex++).doubleValue();
    data[dataIndex++] = (float) vertexCoords.get(vertexIndex++).doubleValue();
    data[dataIndex++] = (float) vertexCoords.get(vertexIndex++).doubleValue();
    data[dataIndex++] = (float) texCoords.get(texIndex++).doubleValue();
    data[dataIndex++] = (float) texCoords.get(texIndex++).doubleValue();
  }
  Mesh mesh = new Mesh( true, vertexCoords.size() / 3, 0,
          new VertexAttribute(VertexAttributes.Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE),
          new VertexAttribute(VertexAttributes.Usage.TextureCoordinates, 2, ShaderProgram.TEXCOORD_ATTRIBUTE + "0"));
  mesh.setVertices(data);
  return mesh;
}
 

private Mesh buildMeshFromVertices(List<Double> vertexCoords) {
  if ((vertexCoords.size() % 3) != 0) {
    throw new RuntimeException("Vertex coordinates size is " + vertexCoords.size() + "; must be a multiple of 3");
  }
  float[] data = new float[vertexCoords.size()];
  for (int i = 0; i < vertexCoords.size(); i++) {
    data[i] = (float) vertexCoords.get(i).doubleValue();
  }
  Mesh mesh = new Mesh( true, vertexCoords.size() / 3, 0,
          new VertexAttribute(VertexAttributes.Usage.Position, 3, ShaderProgram.POSITION_ATTRIBUTE));
  mesh.setVertices(data);
  return mesh;
}
 

public ViewportQuadMesh() {
	this(new VertexAttribute(Usage.Position, 2, "a_position"),
			new VertexAttribute(Usage.TextureCoordinates, 2, "a_texCoord0"));
}
 

private static StillSubMesh readStillSubMesh (BufferedReader in, boolean flipV) throws IOException {
	String name = readString(in);
	IntArray indices = readFaces(in);
	int numVertices = readInt(in);
	int numAttributes = readInt(in);

	if (!readString(in).equals("position")) throw new GdxRuntimeException("first attribute must be position.");
	int numUvs = 0;
	boolean hasNormals = false;
	for (int i = 1; i < numAttributes; i++) {
		String attributeType = readString(in);

		if (!attributeType.equals("normal") && !attributeType.equals("uv"))
			throw new GdxRuntimeException("attribute name must be normal or uv");

		if (attributeType.equals("normal")) {
			if (i != 1) throw new GdxRuntimeException("attribute normal must be second attribute");
			hasNormals = true;
		}
		if (attributeType.equals("uv")) {
			numUvs++;
		}
	}
	VertexAttribute[] vertexAttributes = createVertexAttributes(hasNormals, numUvs);
	int vertexSize = new VertexAttributes(vertexAttributes).vertexSize / 4;
	float[] vertices = new float[numVertices * vertexSize];
	int idx = 0;
	int uvOffset = hasNormals ? 6 : 3;
	for (int i = 0; i < numVertices; i++) {
		readFloatArray(in, vertices, idx);
		if (flipV) {
			for (int j = idx + uvOffset + 1; j < idx + uvOffset + numUvs * 2; j += 2) {
				vertices[j] = 1 - vertices[j];
			}
		}
		idx += vertexSize;
	}

	Mesh mesh = new Mesh(true, numVertices, indices.size, vertexAttributes);
	mesh.setVertices(vertices);
	mesh.setIndices(convertToShortArray(indices));
	return new StillSubMesh(name, mesh, GL20.GL_TRIANGLES);
}
 

public ViewportQuadMesh(VertexAttribute... vertexAttributes) {
	mesh = new Mesh(true, 4, 0, vertexAttributes);
	mesh.setVertices(verts);
}
 

/** 
 * Creates new positional light and automatically adds it to the specified
 * {@link RayHandler} instance.
 * 
 * @param rayHandler
 *            not null instance of RayHandler
 * @param rays
 *            number of rays - more rays make light to look more realistic
 *            but will decrease performance, can't be less than MIN_RAYS
 * @param color
 *            light color
 * @param distance
 *            light distance (if applicable)
 * @param x
 *            horizontal position in world coordinates
 * @param y
 *            vertical position in world coordinates
 * @param directionDegree
 *            direction in degrees (if applicable) 
 */
public PositionalLight(RayHandler rayHandler, int rays, Color color, float distance, float x, float y, float directionDegree) {
	super(rayHandler, rays, color, distance, directionDegree);
	start.x = x;
	start.y = y;

	lightMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum, 0, new VertexAttribute(Usage.Position, 2,
		"vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
		new VertexAttribute(Usage.Generic, 1, "s"));
	softShadowMesh = new Mesh(VertexDataType.VertexArray, false, vertexNum * 2, 0, new VertexAttribute(Usage.Position, 2,
		"vertex_positions"), new VertexAttribute(Usage.ColorPacked, 4, "quad_colors"),
		new VertexAttribute(Usage.Generic, 1, "s"));
	setMesh();
}