78 lines
2.4 KiB
JavaScript
78 lines
2.4 KiB
JavaScript
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const cnst={
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inertia:{
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rot:1/1000,
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mov:1/1000
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},
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drag:{
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rot:1,
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mov:1
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},
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grip:0.7,
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rebound:0.7,
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slide:0.7
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}
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vdot=(a,b)=>a.map((x,i)=>a[i]*b[i]).reduce((m,n)=>m+n)
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vcross=(a,b)=>[a[1]*b[2]-a[2]*b[1],a[2]*b[0]-a[0]*b[2],a[0]*b[1]-a[1]*b[0]]
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vnorm=a=>{let b=Math.sqrt(a[0]*a[0]+a[1]*a[1]+a[2]*a[2]);if(b==0)return [0,0,0];return [a[0]/b,a[1]/b,a[2]/b]}
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vadd=(a,b)=>[a[0]+b[0],a[1]+b[1],a[2]+b[2]]
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vmult=(a,b)=>[a[0]*b[0],a[1]*b[1],a[2]*b[2]]
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vmultf=(a,b)=>[a[0]*b,a[1]*b,a[2]*b]
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vmag=a=>Math.sqrt(a[0]*a[0]+a[1]*a[1]+a[2]*a[2])
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vsnap=(a,b)=>vadd(a,vmultf(b,-vdot(b,a)))
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vtransform=(a,p,v)=>{
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let x=[...p],b=[...a,vcross(...a)]
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for(let z=0;z<3;z++){for(let i=0;i<3;i++){x[i]+=b[z][i]*v[z]}}
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return x
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}
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vdetransform=(a,p,v)=>{
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let x=[v[0]-p[0],v[1]-p[1],v[2]-p[2]]
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return [vdot(x,a[0]),vdot(x,a[1]),vdot(x,vcross(...a))]
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}
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pointAt=(p,c)=>{
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rnd.rotateY(-Math.atan2(p[2]-c[2],p[0]-c[0]))
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rnd.rotateZ(Math.atan2(p[1]-c[1],Math.sqrt((p[0]-c[0])*(p[0]-c[0])+(p[2]-c[2])*(p[2]-c[2]))))
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}
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drawScreenAt=(p,c)=>{
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rnd.translate(...p)
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pointAt(p,c)
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}
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build_pointAt=(p,c)=>{
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build_rnd.rotateY(-Math.atan2(p[2]-c[2],p[0]-c[0]))
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build_rnd.rotateZ(Math.atan2(p[1]-c[1],Math.sqrt((p[0]-c[0])*(p[0]-c[0])+(p[2]-c[2])*(p[2]-c[2]))))
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}
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build_drawScreenAt=(p,c)=>{
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build_rnd.translate(...p)
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build_pointAt(p,c)
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}
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let currUID=0
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newUID=_=>{
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currUID++
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return 'UID_'+currUID.toString()
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}
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keyToCode=(dir,n)=>{
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let mapTable=(`RIGHT 39_LEFT 37_DOWN 40_UP 38_SHIFT 16_SPACE 32_0 48_1 49_2 50_3 51_4 52_5 53_6 54_7 55_8 56_9 57_a 65_b 66_c 67_d 68_e 69_f 70_g 71_h 72_i 73_j 74_k 75_l 76_m 77_n 78_o 79_p 80_q 81_r 82_s 83_t 84_u 85_v 86_w 87_x 88_y 89_z 90`).split('_')
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if(dir=='key'){for(let i=0;i<mapTable.length;i++){if(mapTable[i].endsWith(n.toString()))return mapTable[i].split(' ')[0]}}
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else if(dir=='code'){for(let i=0;i<mapTable.length;i++){if(mapTable[i].startsWith(n))return parseInt(mapTable[i].slice(mapTable[i].length-2,mapTable[i].length))}}
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return 0
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}
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mlookAt=(p2,a2)=>{
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let a=[],p=[...p2]
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a.push([...a2[0]],[...a2[1]])
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a.push(vcross(...a))
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a[0]=vnorm(a[0])
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a[1]=vnorm(a[1])
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return [...a[0],0,...a[1],0,...a[2],0,...p,1]
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}
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line3d=(r,a,b,w=0.03)=>{
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r.push()
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let x=[vnorm(vadd(a,vmultf(b,-1)))],c=vmultf(vadd(a,b),1/2)
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if(x[0][0]>0.9)x.push([0,1,0])
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else x.push([1,0,0])
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x[1]=vnorm(vcross(...x))
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x.push(vnorm(vcross(...x)))
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r.applyMatrix([...x[0],0,...x[1],0,...x[2],0,...c,1])
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r.box(vmag(vadd(a,vmultf(b,-1))),w,w)
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r.pop()
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}
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sqrx=a=>a*a
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