Java GeometryInfo.setColors方法代码示例

import com.sun.j3d.utils.geometry.GeometryInfo; //导入方法依赖的package包/类
/**
 * Returns a half sphere oriented inward and with texture ordinates 
 * that spread along an hemisphere. 
 */
private Geometry createHalfSphereGeometry(boolean top)
{
	final int divisionCount = 48;
	Point3f[] coords = new Point3f[divisionCount * divisionCount];
	TexCoord2f[] textureCoords = top ? new TexCoord2f[divisionCount * divisionCount] : null;
	Color3f[] colors = top ? null : new Color3f[divisionCount * divisionCount];
	for (int i = 0, k = 0; i < divisionCount; i++)
	{
		double alpha = i * 2 * Math.PI / divisionCount;
		float cosAlpha = (float) Math.cos(alpha);
		float sinAlpha = (float) Math.sin(alpha);
		double nextAlpha = (i + 1) * 2 * Math.PI / divisionCount;
		float cosNextAlpha = (float) Math.cos(nextAlpha);
		float sinNextAlpha = (float) Math.sin(nextAlpha);
		for (int j = 0; j < divisionCount / 4; j++)
		{
			double beta = 2 * j * Math.PI / divisionCount;
			float cosBeta = (float) Math.cos(beta);
			float sinBeta = (float) Math.sin(beta);
			// Correct the bottom of the hemisphere to avoid seeing a bottom hemisphere at the horizon
			float y = j != 0 ? (top ? sinBeta : -sinBeta) : -0.01f;
			double nextBeta = 2 * (j + 1) * Math.PI / divisionCount;
			if (!top)
			{
				nextBeta = -nextBeta;
			}
			float cosNextBeta = (float) Math.cos(nextBeta);
			float sinNextBeta = (float) Math.sin(nextBeta);
			if (top)
			{
				coords[k] = new Point3f(cosAlpha * cosBeta, y, sinAlpha * cosBeta);
				textureCoords[k++] = new TexCoord2f((float) i / divisionCount, sinBeta);
				
				coords[k] = new Point3f(cosNextAlpha * cosBeta, y, sinNextAlpha * cosBeta);
				textureCoords[k++] = new TexCoord2f((float) (i + 1) / divisionCount, sinBeta);
				
				coords[k] = new Point3f(cosNextAlpha * cosNextBeta, sinNextBeta, sinNextAlpha * cosNextBeta);
				textureCoords[k++] = new TexCoord2f((float) (i + 1) / divisionCount, sinNextBeta);
				
				coords[k] = new Point3f(cosAlpha * cosNextBeta, sinNextBeta, sinAlpha * cosNextBeta);
				textureCoords[k++] = new TexCoord2f((float) i / divisionCount, sinNextBeta);
			}
			else
			{
				coords[k] = new Point3f(cosAlpha * cosBeta, y, sinAlpha * cosBeta);
				float color1 = .9f + y * .5f;
				colors[k++] = new Color3f(color1, color1, color1);
				
				coords[k] = new Point3f(cosAlpha * cosNextBeta, sinNextBeta, sinAlpha * cosNextBeta);
				float color2 = .9f + sinNextBeta * .5f;
				colors[k++] = new Color3f(color2, color2, color2);
				
				coords[k] = new Point3f(cosNextAlpha * cosNextBeta, sinNextBeta, sinNextAlpha * cosNextBeta);
				colors[k++] = new Color3f(color2, color2, color2);
				
				coords[k] = new Point3f(cosNextAlpha * cosBeta, y, sinNextAlpha * cosBeta);
				colors[k++] = new Color3f(color1, color1, color1);
			}
		}
	}
	
	GeometryInfo geometryInfo = new GeometryInfo(GeometryInfo.QUAD_ARRAY);
	geometryInfo.setCoordinates(coords);
	if (textureCoords != null)
	{
		geometryInfo.setTextureCoordinateParams(1, 2);
		geometryInfo.setTextureCoordinates(0, textureCoords);
	}
	if (colors != null)
	{
		geometryInfo.setColors(colors);
	}
	geometryInfo.indexify();
	geometryInfo.compact();
	Geometry halfSphereGeometry = geometryInfo.getIndexedGeometryArray();
	return halfSphereGeometry;
}
 

import com.sun.j3d.utils.geometry.GeometryInfo; //导入方法依赖的package包/类
/**
 * Create a java3d Shape for the terrain
 * @param inModel threedModel
 * @param inHelper terrain helper
 * @param inBaseImage base image for shape, or null for no image
 * @return Shape3D object
 */
private static Shape3D createTerrain(ThreeDModel inModel, TerrainHelper inHelper, GroutedImage inBaseImage)
{
	final int numNodes = inHelper.getGridSize();
	final int RESULT_SIZE = numNodes * (numNodes * 2 - 2);
	int[] stripData = inHelper.getStripLengths();

	// Get the scaled terrainTrack coordinates (or just heights) from the model
	final int nSquared = numNodes * numNodes;
	Point3d[] rawPoints = new Point3d[nSquared];
	for (int i=0; i<nSquared; i++)
	{
		double height = inModel.getScaledTerrainValue(i) * MODEL_SCALE_FACTOR;
		rawPoints[i] = new Point3d(inModel.getScaledTerrainHorizValue(i) * MODEL_SCALE_FACTOR,
			Math.max(height, 0.05), // make sure it's above the box
			-inModel.getScaledTerrainVertValue(i) * MODEL_SCALE_FACTOR);
	}

	GeometryInfo gi = new GeometryInfo(GeometryInfo.TRIANGLE_STRIP_ARRAY);
	gi.setCoordinates(inHelper.getTerrainCoordinates(rawPoints));
	gi.setStripCounts(stripData);

	Appearance tAppearance = new Appearance();
	if (inBaseImage != null)
	{
		gi.setTextureCoordinateParams(1,  2); // one coord set of two dimensions
		gi.setTextureCoordinates(0, inHelper.getTextureCoordinates());
		Texture mapImage = new TextureLoader(inBaseImage.getImage()).getTexture();
		tAppearance.setTexture(mapImage);
		TextureAttributes texAttr = new TextureAttributes();
		texAttr.setTextureMode(TextureAttributes.MODULATE);
		tAppearance.setTextureAttributes(texAttr);
	}
	else
	{
		Color3f[] colours = new Color3f[RESULT_SIZE];
		Color3f terrainColour = new Color3f(0.1f, 0.2f, 0.2f);
		for (int i=0; i<RESULT_SIZE; i++) {colours[i] = terrainColour;}
		gi.setColors(colours);
	}
	new NormalGenerator().generateNormals(gi);
	Material terrnMat = new Material(new Color3f(0.4f, 0.4f, 0.4f), // ambient colour
		new Color3f(0f, 0f, 0f), // emissive (none)
		new Color3f(0.8f, 0.8f, 0.8f), // diffuse
		new Color3f(0.2f, 0.2f, 0.2f), //specular
		30f); // shinyness
	tAppearance.setMaterial(terrnMat);
	return new Shape3D(gi.getGeometryArray(), tAppearance);
}