package framework.view3D;
import java.util.ArrayList;
import java.util.Enumeration;
import javax.media.j3d.Appearance;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.DistanceLOD;
import javax.media.j3d.Geometry;
import javax.media.j3d.GraphicsContext3D;
import javax.media.j3d.LOD;
import javax.media.j3d.Light;
import javax.media.j3d.Node;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.geometry.Cylinder;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.geometry.Sphere;
import framework.model3D.BackgroundBox;
import framework.model3D.BaseObject3D;
import framework.model3D.BumpMapGenerator;
import framework.model3D.FresnelsReflectionMapGenerator;
import framework.model3D.IViewer3D;
import framework.model3D.Object3D;
import framework.model3D.ReflectionMapGenerator;
public class Viewer3D implements IViewer3D {
GraphicsContext3D graphicsContext3D = null;
ReflectionMapShader reflectionMappingShader = null;
FresnelsReflectionMapShader fresnelsReflectionMappingShader = null;
Dot3BumpMapShader dot3BumpMappingShader = null;
FlatDot3BumpMapShader flatDot3BumpMappingShader = null;
ArrayList<Light> lights = null;
BackgroundBox skyBox = null;
Camera3D camera = null;
// 以下は省メモリ化のため導入
static private Point3f center = new Point3f();
static private Point3f origin = new Point3f();
public Viewer3D(Camera3D camera) {
this.camera = camera;
reflectionMappingShader = new ReflectionMapShader();
fresnelsReflectionMappingShader = new FresnelsReflectionMapShader();
dot3BumpMappingShader = new Dot3BumpMapShader();
flatDot3BumpMappingShader = new FlatDot3BumpMapShader();
}
@Override
public void setGraphicsContext3D(GraphicsContext3D graphicsContext3D) {
this.graphicsContext3D = graphicsContext3D;
}
@Override
public void update(ArrayList<Light> lights, BackgroundBox skyBox) {
// 光源の更新
if (this.lights != lights) {
this.lights = lights;
for (int n = 0; n < lights.size(); n++) {
if (lights.get(n) instanceof DirectionalLight) {
// 平行光源の場合
DirectionalLight dirlight = (DirectionalLight)lights.get(n);
dot3BumpMappingShader.init(dirlight);
flatDot3BumpMappingShader.init(dirlight);
break;
}
}
}
// スカイボックスの更新
if (this.skyBox != skyBox) {
this.skyBox = skyBox;
reflectionMappingShader.init(skyBox);
fresnelsReflectionMappingShader.init(skyBox);
}
}
public void draw(BaseObject3D obj) {
// GraphicsContext3D 内の光源の更新
if (lights != null && lights.size() != graphicsContext3D.numLights()) {
for (int n = 0; n < lights.size(); n++) {
graphicsContext3D.addLight(lights.get(n));
}
}
Enumeration<Node> primitives = obj.getPrimitiveNodes();
ReflectionMapGenerator reflectionMapGenerator = obj.getReflectionMappingInfo();
BumpMapGenerator bumpMapGenerator = obj.getBumpMappingInfo();
int n = 0;
while (primitives.hasMoreElements()) {
if (obj instanceof Object3D && ((Object3D)obj).isLODSet()) {
// LOD の判定
LOD lodNode = ((Object3D)obj).getLOD();
if (lodNode instanceof DistanceLOD) {
double nearSide = 0.0;
double farSide = 0.0;
DistanceLOD distanceLOD = ((DistanceLOD)lodNode);
if (n > distanceLOD.numDistances()) break;
if (n > 0) nearSide = distanceLOD.getDistance(n - 1);
if (n < distanceLOD.numDistances()) farSide = distanceLOD.getDistance(n);
distanceLOD.getPosition(center);
Transform3D trans = new Transform3D();
graphicsContext3D.getModelTransform(trans);
trans.transform(center); // オブジェクトの中心座標（世界座標上）
trans = camera.getWorldToView();
trans.transform(center); // オブジェクトの中心座標（カメラ座標上）
double distance = (double)center.distance(origin);
if (distance < nearSide) {
break;
} else if (distance > farSide && n < distanceLOD.numDistances()) {
n++;
continue;
}
}
}
Node primitive = primitives.nextElement();
if (primitive instanceof Shape3D) {
// Shape3Dをレンダリング
Appearance ap = ((Shape3D)primitive).getAppearance();
if (bumpMapGenerator != null) {
// obj にはバンプマッピングが設定されている
if (!bumpMapGenerator.isHorizontal()) {
dot3BumpMappingShader.updateAppearance(ap, bumpMapGenerator, camera);
} else {
// 水平のポリゴンに対しては、よりテクスチャユニットの消費量が少ない FlatDot3BumpMapShader を使う
flatDot3BumpMappingShader.updateAppearance(ap, bumpMapGenerator, camera);
}
}
if (reflectionMapGenerator != null) {
// obj には反射マッピングが設定されている
if (reflectionMapGenerator instanceof FresnelsReflectionMapGenerator) {
// フレネル反射を使用
fresnelsReflectionMappingShader.updateAppearance(ap, (FresnelsReflectionMapGenerator)reflectionMapGenerator, camera);
} else {
reflectionMappingShader.updateAppearance(ap, reflectionMapGenerator, camera);
}
}
if (((Shape3D)primitive).getGeometry() != null) {
graphicsContext3D.draw((Shape3D)primitive);
}
} else if (primitive instanceof Primitive) {
Appearance ap = ((Primitive)primitive).getAppearance();
if (bumpMapGenerator != null) {
// obj にはバンプマッピングが設定されている
if (!bumpMapGenerator.isHorizontal()) {
dot3BumpMappingShader.updateAppearance(ap, bumpMapGenerator, camera);
} else {
// 水平のポリゴンに対しては、よりテクスチャユニットの消費量が少ない FlatDot3BumpMapShader を使う
flatDot3BumpMappingShader.updateAppearance(ap, bumpMapGenerator, camera);
}
}
if (reflectionMapGenerator != null) {
// obj には反射マッピングが設定されている
if (reflectionMapGenerator instanceof FresnelsReflectionMapGenerator) {
// フレネル反射を使用
fresnelsReflectionMappingShader.updateAppearance(ap, (FresnelsReflectionMapGenerator)reflectionMapGenerator, camera);
} else {
reflectionMappingShader.updateAppearance(ap, reflectionMapGenerator, camera);
}
}
graphicsContext3D.setAppearance(ap);
if (primitive instanceof Cone) {
// Coneをレンダリング
Geometry g = ((Cone)primitive).getShape(Cone.BODY).getGeometry();
graphicsContext3D.draw(g);
g = ((Cone)primitive).getShape(Cone.CAP).getGeometry();
graphicsContext3D.draw(g);
} else if (primitive instanceof Cylinder) {
// Cylinderをレンダリング
Geometry g = ((Cylinder)primitive).getShape(Cylinder.BODY).getGeometry();
graphicsContext3D.draw(g);
g = ((Cylinder)primitive).getShape(Cylinder.TOP).getGeometry();
graphicsContext3D.draw(g);
g = ((Cylinder)primitive).getShape(Cylinder.BOTTOM).getGeometry();
graphicsContext3D.draw(g);
} else if (primitive instanceof Box) {
// Boxをレンダリング
Geometry g = ((Box)primitive).getShape(Box.TOP).getGeometry();
graphicsContext3D.draw(g);
g = ((Box)primitive).getShape(Box.BOTTOM).getGeometry();
graphicsContext3D.draw(g);
g = ((Box)primitive).getShape(Box.FRONT).getGeometry();
graphicsContext3D.draw(g);
g = ((Box)primitive).getShape(Box.BACK).getGeometry();
graphicsContext3D.draw(g);
g = ((Box)primitive).getShape(Box.LEFT).getGeometry();
graphicsContext3D.draw(g);
g = ((Box)primitive).getShape(Box.RIGHT).getGeometry();
graphicsContext3D.draw(g);
} else if (primitive instanceof Sphere) {
// Sphereをレンダリング
Geometry g = ((Sphere)primitive).getShape().getGeometry();
graphicsContext3D.draw(g);
}
}
n++;
}
}
@Override
public void setModelTransform(Transform3D t) {
graphicsContext3D.setModelTransform(t);
}
}
