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302 lines
8.9 KiB
302 lines
8.9 KiB
14 years ago
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var ctx
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var centreX, centreY
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var echelle3D = 50
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var precisionDroite3D = 0.02
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var precisionFonction3D = 0.2
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var fonction3D = false
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var angle = Math.PI/8
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var valeurZoom3D = 1
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var gauche3D = -6.5
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var droite3D = 6.5
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var outilPrecedent = ""
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var rouge3D = 0
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var vert3D = 1
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var bleu3D = 2
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var couleurGenerale = 0
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function activer3D(){
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if(fonction3D){ // Si activé alors on le désative
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fonction3D = false
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choixOutil(outilPrecedent)
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document.getElementById('onglet3D').innerHTML = "3D"
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largeur = 500
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document.getElementById("affichage").style.width = largeur+"px"
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document.getElementById("affichage").style.left = "129px"
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document.getElementById("flecheGauche").style.left = "137px"
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document.getElementById("flecheHaut").style.left = "345px"
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document.getElementById("flecheBas").style.left = "345px"
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document.getElementById("gauche").style.display = "block"
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document.getElementById("gauche3D").style.display = "none"
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var elements = document.getElementsByClassName("menu")
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for(var i=0; i<elements.length; i++){
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elements[i].style.left = "121px"
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}
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reinitialiserZoom(5)
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}
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else{ // Sinon on l'active
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fonction3D = true
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outilPrecedent = outil
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choixOutil("deplacement")
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document.getElementById('onglet3D').innerHTML = "2D"
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largeur = 570
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document.getElementById("affichage").style.width = largeur+"px"
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document.getElementById("affichage").style.left = "59px"
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document.getElementById("flecheGauche").style.left = "67px"
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document.getElementById("flecheHaut").style.left = "290px"
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document.getElementById("flecheBas").style.left = "290px"
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document.getElementById("gauche").style.display = "none"
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document.getElementById("gauche3D").style.display = "block"
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var elements = document.getElementsByClassName("menu")
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for(var i=0; i<elements.length; i++){
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elements[i].style.left = "61px"
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}
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initialise3D()
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}
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}
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function initialise3D() {
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centreX = largeur / 2
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centreY = hauteur / 2
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document.getElementById("affichage").innerHTML = '<canvas id="canvas" width="'+largeur+'" height="'+hauteur+'"></canvas>'
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ctx = document.getElementById('canvas').getContext('2d')
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ctx.clearRect(0, 0, 640, 480)
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ctx.fillStyle = "rgba(0, 0, 0, 0.5)"
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ctx.fillRect(0,0,640,480)
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axes()
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}
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function dessiner3D(eq){
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initialise3D()
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if(document.getElementById("selectAffichage3D").value == "points"){
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var coordX, coordY, coordZ
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for(var x=gauche3D; x<droite3D; x+=precisionFonction3D){
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for(var y=gauche3D; y<droite3D; y+=precisionFonction3D){
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coordX = x
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coordY = y
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coordZ = eval(eq)
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if(isNaN(coordZ)){
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continue
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}
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point3D(coordX, coordY, coordZ)
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}
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}
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}
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else{
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var x1, y1, z1, x2, y2, z2, x3, y3, z3
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var x, y
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for(var x1=gauche3D; x1<droite3D; x1+=precisionFonction3D){
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for(var y1=gauche3D; y1<droite3D; y1+=precisionFonction3D){
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x = x1
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y = y1
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z1 = eval(eq)
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x2 = x1 + precisionFonction3D
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y2 = y1
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x = x2
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//y = y2
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z2 = eval(eq)
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x3 = x2
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y3 = y2 + precisionFonction3D
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//x = x3
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y = y3
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z3 = eval(eq)
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x4 = x3 - precisionFonction3D
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y4 = y3
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x = x4
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//y = y4
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z4 = eval(eq)
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if(isNaN(z1)||isNaN(z2)||isNaN(z3)||isNaN(z4)){
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continue
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}
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polygone3D(x1, y1, z1, x2, y2, z2, x3, y3, z3, x4, y4, z4)
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}
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}
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}
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}
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// Dessine un point à la position (x, y, z)
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function point3D(x, y, z){
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var posX = (Math.sin(angle)*x + Math.cos(angle)*y)*echelle3D
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var posZ = -(z - Math.cos(angle)*x/2.6 + Math.sin(angle)*y/2.6)*echelle3D
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var opacity = Math.round((1-((5+y*Math.sin(angle)-x*Math.cos(angle)) / 450)*echelle3D)*1000)/1000
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var couleur = new Array()
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couleur[0] = Math.round((5+z)*echelle3D)
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couleur[1] = Math.round(510 - (5+z)*echelle3D)
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couleur[2] = couleurGenerale
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if(opacity > 1){ opacity = 1 }
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if(opacity < 0){ opacity = 0 }
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if(couleur[0] > 255){ couleur[0] = 255 }
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if(couleur[0] < 0){ couleur[0] = 0 }
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if(couleur[1] > 255){ couleur[1] = 255 }
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if(couleur[1] < 0){ couleur[1] = 0 }
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ctx.save()
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ctx.translate(centreX, centreY)
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ctx.scale(valeurZoom3D, valeurZoom3D)
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ctx.fillStyle = "rgba("+couleur[rouge3D]+","+couleur[vert3D]+", "+couleur[bleu3D]+", "+opacity+")"
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ctx.fillRect(posX-1, posZ-1, 2, 2)
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ctx.restore()
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}
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// Dessine un polygone qui a comme sommets : (x1, y1, z1) , (x2, y2, z2), (x3, y3, z3) et (x4, y4, z4)
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function polygone3D(x1, y1, z1, x2, y2, z2, x3, y3, z3, x4, y4, z4){
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ctx.save()
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ctx.translate(centreX, centreY)
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ctx.scale(valeurZoom3D, valeurZoom3D)
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ctx.beginPath()
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ctx.moveTo((Math.sin(angle)*x1 + Math.cos(angle)*y1)*echelle3D , -(z1 - Math.cos(angle)*x1/2.6 + Math.sin(angle)*y1/2.6)*echelle3D)
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ctx.lineTo((Math.sin(angle)*x2 + Math.cos(angle)*y2)*echelle3D , -(z2 - Math.cos(angle)*x2/2.6 + Math.sin(angle)*y2/2.6)*echelle3D)
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ctx.lineTo((Math.sin(angle)*x3 + Math.cos(angle)*y3)*echelle3D , -(z3 - Math.cos(angle)*x3/2.6 + Math.sin(angle)*y3/2.6)*echelle3D)
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ctx.lineTo((Math.sin(angle)*x4 + Math.cos(angle)*y4)*echelle3D , -(z4 - Math.cos(angle)*x4/2.6 + Math.sin(angle)*y4/2.6)*echelle3D)
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var opacity = Math.round((1-((5+y1*Math.sin(angle)-x1*Math.cos(angle)) / 450)*echelle3D)*1000)/1000
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var couleur = new Array()
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couleur[0] = Math.round((5+z1)*echelle3D)
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couleur[1] = Math.round(510 - (5+z1)*echelle3D)
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couleur[2] = couleurGenerale
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if(opacity > 1){ opacity = 1 }
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if(opacity < 0){ opacity = 0 }
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if(couleur[0] > 255){ couleur[0] = 255 }
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if(couleur[0] < 0){ couleur[0] = 0 }
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if(couleur[1] > 255){ couleur[1] = 255 }
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if(couleur[1] < 0){ couleur[1] = 0 }
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ctx.fillStyle = "rgba("+couleur[rouge3D]+","+couleur[vert3D]+", "+couleur[bleu3D]+", "+opacity+")"
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ctx.closePath()
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ctx.fill()
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ctx.restore()
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}
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// Dessine les axes
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function axes(){
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for(var i=-5; i<5; i+=precisionDroite3D){
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point3D(0, 0, i)
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}
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for(var i=-5.5; i<5.5; i+=precisionDroite3D){
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point3D(i, 0, 0)
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}
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for(var i=-5.5; i<5.5; i+=precisionDroite3D){
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point3D(0, i, 0)
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}
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}
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function cube(x, y, z, r){
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// Face de devant
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+i, y, z)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r, y+i, z)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r-i, y+r, z)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x, y+r-i, z)
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}
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// Face de derrière
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+i, y, z+r)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r, y+i, z+r)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r-i, y+r, z+r)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x, y+r-i, z+r)
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}
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// Arrêtes
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x, y, z+i)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x, y+r, z+i)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r, y, z+i)
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}
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for(var i=0; i<r; i+=precisionDroite3D){
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point3D(x+r, y+r, z+i)
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}
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}
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// Change les couleurs de l'affichage 3D et affiche l'aperçu de celles-ci.
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function checkCouleurs3D(){
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var rouge, vert, bleu
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var sensRouge, sensVert, sensBleu
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var precisionApercu = 64
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couleurGenerale = parseInt(document.getElementById("couleur3Dgenerale").value)
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if(!couleurGenerale){ couleurGenerale = 0 }
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if(couleurGenerale < 0){ couleurGenerale = 0 }
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if(couleurGenerale > 255){ couleurGenerale = 255 }
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switch(document.getElementById("selectRouge3D").value){
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case "plus":
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rouge3D = 0
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rouge = 255
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sensRouge = -1
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break
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case "moins":
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rouge3D = 1
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rouge = 0
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sensRouge = 1
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break
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case "tout":
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rouge3D = 2
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rouge = couleurGenerale
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sensRouge = 0
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break
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}
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switch(document.getElementById("selectVert3D").value){
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case "plus":
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vert3D = 0
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vert = 255
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sensVert = -1
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break
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case "moins":
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vert3D = 1
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vert = 0
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sensVert = 1
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break
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case "tout":
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vert3D = 2
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vert = couleurGenerale
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sensVert = 0
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break
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}
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switch(document.getElementById("selectBleu3D").value){
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case "plus":
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bleu3D = 0
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bleu = 255
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sensBleu = -1
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break
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case "moins":
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bleu3D = 1
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bleu = 0
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sensBleu = 1
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break
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case "tout":
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bleu3D = 2
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bleu = couleurGenerale
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sensBleu = 0
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break
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}
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document.getElementById("apercuCouleur3D").innerHTML = "<span style='background-color:rgba("+rouge+","+vert+","+bleu+",1);color:rgba(0,0,0,0);'>.</span>"
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for(var i=0; i<precisionApercu; i++){
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rouge = rouge + sensRouge*(256/precisionApercu)
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vert = vert + sensVert*(256/precisionApercu)
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bleu = bleu + sensBleu*(256/precisionApercu)
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document.getElementById("apercuCouleur3D").innerHTML = document.getElementById("apercuCouleur3D").innerHTML + "<span style='background-color:rgba("+rouge+","+vert+","+bleu+",1);color:rgba(0,0,0,0);'>.</span>"
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}
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}
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function zoom3D(valeur){
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valeurZoom3D *= valeur
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gauche3D /= valeur
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droite3D /= valeur
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precisionFonction3D /= valeur
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precisionDroite3D /= valeur
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//alert(valeurZoom3D+" ; "+gauche3D+" ; "+droite3D+" ; "+precisionFonction3D+" ; "+precisionDroite3D)
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actualiserGraph()
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}
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