gallery_water.zip_gallery_water_java 3d

import java.awt.*; import java.awt.image.*; import javax.imageio.ImageIO; public class polygon3D{ public vector[] tempVertix; public vector[] vertix2D; public vector[] vertix3D; public int[] vertixSpecular; public vector[] vertixNormals; public vector[] temp_vertixNormals; public static vector[] tempVectors; public vector normal, realNormal; public vector centre, realCentre; public static int[] xLow, xHigh, s_left, s_right, xChange_left, xChange_right; public int[] xLow_transprent, xHigh_transprent; public int height; public int topIndex; public boolean visible; public Rectangle bound; public double zMax, zMin; public texture myTexture; public double textureScaleX, textureScaleY; public vector W, O, V, U, A, B, C; public double aDotW, bDotW, cDotW; public double scaleX = 1, scaleY = 1; public int textureWidth, textureHeight, heightMask, widthMask, widthBits, heightBits; public int X, Y, X1, Y1, dx, dy, textureIndex; public int visibleCount; public vector origin, rightEnd, bottomEnd; public int L; public vector view = new vector(0,0,1); public int end = 0; public int start = 479; public boolean isLightMap; public int[] Texture; public int Z_length; public double A_offset, B_offset, C_offset; public boolean faceVerticalPolygon; public int BigX, BigY, BigDx, BigDy; public boolean gouraudShading; public int diffuse_I; public int ambient_I; public int roughness; public boolean waterSurface; public polygon3D(vector[] vertix3D, vector origin, vector rightEnd, vector bottomEnd, texture myTexture){ L = vertix3D.length; Z_length = vector.Z_length; tempVectors = new vector[4]; for(int i = 0; i < tempVectors.length; i++) if(tempVectors[i] == null) tempVectors[i] = new vector(); this.vertix3D = vertix3D; tempVertix = new vector[L]; for(int i = 0; i < L; i++){ tempVertix[i] = new vector(); tempVertix[i].set(vertix3D[i]); } centre = new vector(0,0,0); testVisibility(); if(Math.abs(normal.y) > 0.99) faceVerticalPolygon = true; else faceVerticalPolygon = false; realNormal = new vector(0,0,0); realNormal.set(normal); realCentre = new vector(0,0,0); realCentre.set(centre); this.myTexture = myTexture; if(myTexture == null) return; ambient_I = 60; findDiffuse(); Texture = myTexture.Texture; this.origin = origin; this.rightEnd = rightEnd; this.bottomEnd = bottomEnd; textureWidth = myTexture.width; textureHeight = myTexture.height; heightMask = myTexture.heightMask; widthMask = myTexture.widthMask; widthBits = myTexture.widthBits; heightBits = myTexture.heightBits; findTextureScale(); W = new vector(); O = new vector(); V = new vector(); U = new vector(); A = new vector(); B = new vector(); C = new vector(); vertix2D = new vector[L+1]; for(int i = 0; i < vertix2D.length; i++) vertix2D[i] = new vector(0,0,0); vertixSpecular = new int[L+1]; temp_vertixNormals = new vector[L+1]; for(int i = 0; i < L+1; i++) temp_vertixNormals[i] = new vector(0,0,0); vertixNormals = new vector[L]; for(int i = 0; i < L; i++) vertixNormals[i] = new vector(0,0,0); if(xLow == null){ xLow = new int[480]; xHigh = new int[480]; s_left= new int[480]; s_right = new int[480]; xChange_left = new int[480]; xChange_right = new int[480]; } } public final void findTextureScale(){ tempVectors[0].set(origin); tempVectors[0].subtract(rightEnd); double l = tempVectors[0].getLength(); textureScaleX = l/myTexture.width; tempVectors[0].set(origin); tempVectors[0].subtract(bottomEnd); l = tempVectors[0].getLength(); textureScaleY = l/myTexture.height; } public static polygon3D createPolygon(vector[] vertix3D, vector origin, vector rightEnd, vector bottomEnd, texture myTexture, double textureX, double textureY, double scaleX, double scaleY){ vector x = origin.myClone(); x.subtract(rightEnd); x.scale(textureX); vector y = origin.myClone(); y.subtract(bottomEnd); y.scale(textureY); origin.add(x); bottomEnd.add(x); rightEnd.add(x); origin.add(y); bottomEnd.add(y); rightEnd.add(y); polygon3D p = new polygon3D(vertix3D, origin, rightEnd, bottomEnd, myTexture); p.scaleX = scaleX; p.scaleY = scaleY; return p; } public final void update(){ for(int i = 0; i < L; i++){ tempVertix[i].set(vertix3D[i]); tempVertix[i].subtract(camera.position); tempVertix[i].rotate_XZ(); tempVertix[i].rotate_YZ(); tempVertix[i].updateLocation(); } testVisibility(); } public final void findDiffuse(){ tempVectors[0].set(LightSource.s1_); tempVectors[0].subtract(realCentre); tempVectors[0].unit(); double temp = tempVectors[0].dot(realNormal); if(temp <= -0.5) diffuse_I = ambient_I; else diffuse_I = ambient_I + (int)(128*(temp+0.5)); } public final void findSpecular(){ if(diffuse_I == ambient_I){ for(int i = 0; i < vertixSpecular.length; i ++) vertixSpecular[i] = 0; return; } for(int i = 0; i < visibleCount; i++){ tempVectors[2].set(temp_vertixNormals[i]); tempVectors[2].rotate_XZ(); tempVectors[2].rotate_YZ(); tempVectors[0].set(LightSource.s1); tempVectors[0].subtract(vertix2D[i]); tempVectors[0].unit(); tempVectors[1].set(tempVectors[2]); tempVectors[1].scale(2*tempVectors[0].dot(tempVectors[1])); tempVectors[0].subtract(tempVectors[1]); tempVectors[0].scale(-1); tempVectors[1].set(0,0,0); tempVectors[1].subtract(vertix2D[i]); tempVectors[1].unit(); double temp = tempVectors[1].dot(tempVectors[0]); if(temp < 0) temp = 0; else{ for(int j = 0; j < roughness; j++) temp*=temp; } vertixSpecular[i] = (int)(176 * temp) << 16; } } public final void findVectorOUV(){ O.set(origin); O.subtract(camera.position); O.rotate_XZ(-camera.look_right); O.rotate_YZ(camera.look_up); U.set(rightEnd); U.subtract(camera.position); U.rotate_XZ(-camera.look_right); U.rotate_YZ(camera.look_up); V.set(bottomEnd); V.subtract(camera.position); V.rotate_XZ(-camera.look_right); V.rotate_YZ(camera.look_up); U.subtract(O); U.unit(); U.scale(textureScaleX/scaleX); V.subtract(O); V.unit(); V.scale(textureScaleY/scaleY); A = V.cross(O); B = O.cross(U); C = U.cross(V); } public final void testVisibility(){ visible = false; //find normal vector tempVectors[0].set(tempVertix[1]); tempVectors[0].subtract(tempVertix[0]); tempVectors[1].set(tempVertix[2]); tempVectors[1].subtract(tempVertix[1]); normal = tempVectors[0].cross(tempVectors[1]); normal.unit(); //find centre findCentre(); //test whether all vertix is in front of viwer's plane for(int i = 0; i < tempVertix.length; i++){ if(tempVertix[i].z > 0){ visible = true; break; } } //test whether the polygon is within view angle if(visible){ if(view.dot(normal) >= 0.6) visible = false; } //test whether this polygon is facing toward viewer if(visible){ tempVectors[0].set(tempVertix[0]); if(tempVectors[0].dot(normal) >= 0) visible = false; } //test whether this polygon is inside the screen if(visible){ find_zMax_zMin(); visible = camera.screen.intersects(bound); } } public final void findCentre(){ centre.reset(); for(int i = 0; i < tempVertix.length; i++) centre.add(tempVertix[i]); centre.scale(1.0/tempVertix.length); } public final void find_zMax_zMin(){ int xMax = tempVertix[0].screenX; int xMin = xMax; int yMax = tempVertix[0].screenY; int yMin = yMax; zMax = tempVertix[0].z; zMin = zMax; for(int i = 1; i < tempVertix.length; i++){ xMax = Math.max(xMax, t