我正在尝试绘制一个由多个块分解而成的半球。下图是
问题是边缘部分太暗了。我希望表面不那么光滑，这样就能均匀地发光。代码如下：
import three;
size(10cm);
settings.render = 1;
settings.antialias = 16;
defaultrender.merge=true;
defaultrender.tessellate=true;
currentlight = light(0,0,100);
currentprojection =
orthographic(0,0,100);
real[] uknot={0,0,0,0,0,1,1,1,1,1};
real[] vknot={0,0,0,0,0,1,1,1,1,1};
triple[][] P1={{
(-29.282032302755088, -29.282032302755088, 29.282032302755088)/5.071796769724491,
(-21.712083963243018, -30.677838684923557, 30.677838684923557)/4.795919436663918,
(-14.391575887554247, -31.571002659693967, 31.571002659693967)/4.6172866417098355,
(-7.195787943777123, -32.017584647079175, 32.017584647079175)/4.527970244232795,
(0.0, -32.017584647079175, 32.017584647079175)/4.527970244232795
},{
(-30.677838684923557, -21.712083963243018, 30.677838684923557)/4.795919436663918,
(-22.869643776777806, -22.869643776777806, 33.02239411869588)/4.494476595178904,
(-15.200184105546917, -23.632006915798854, 34.56287410349287)/4.295770397960685,
(-7.600092052773459, -24.013188485309378, 35.33311409589136)/4.196417299351575,
(0.0, -24.013188485309378, 35.33311409589136)/4.196417299351575
},{
(-31.571002659693967, -14.391575887554247, 31.571002659693967)/4.6172866417098355,
(-23.632006915798854, -15.200184105546917, 34.562874103492874)/4.295770397960685,
(-15.739256250875362, -15.739256250875362, 36.54993607567506)/4.082178134496292,
(-7.869628125437681, -16.008792323539584, 37.54346706176616)/3.975382002764096,
(0.0, -16.008792323539584, 37.54346706176616)/3.975382002764096
},{
(-32.017584647079175, -7.195787943777123, 32.017584647079175)/4.527970244232795,
(-24.013188485309378, -7.600092052773459, 35.33311409589137)/4.196417299351575,
(-16.008792323539584, -7.869628125437681, 37.543467061766165)/3.9753820027640954,
(-8.004396161769792, -8.004396161769792, 38.64864354470356)/3.864864354470356,
(0.0, -8.004396161769792, 38.64864354470356)/3.864864354470356
},{
(-32.017584647079175, 0.0, 32.017584647079175)/4.527970244232795,
(-24.013188485309378, 0.0, 35.33311409589137)/4.196417299351575,
(-16.008792323539584, 0.0, 37.543467061766165)/3.9753820027640954,
(-8.004396161769792, 0.0, 38.64864354470356)/3.864864354470356,
(0.0, 0.0, 38.64864354470356)/3.864864354470356
}
};
// Optional weights:
real[][] weights1={
{5.071796769724491,4.795919436663918,4.6172866417098355,4.527970244232795, 4.527970244232795 },
{4.795919436663918, 4.494476595178904, 4.295770397960685, 4.196417299351575, 4.196417299351575},
{4.6172866417098355, 4.295770397960685, 4.082178134496292, 3.975382002764096, 3.975382002764096},
{4.527970244232795, 4.196417299351575, 3.9753820027640954, 3.9753820027640954, 3.9753820027640954},
{4.527970244232795, 4.196417299351575, 3.9753820027640954, 3.9753820027640954, 3.9753820027640954}
};
draw(rotate(0, (0,0,1)) * P1,uknot,vknot,weights1,mediumblue);
draw(rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,mediumyellow);
draw(rotate(180, (0,0,1)) * P1,uknot,vknot,weights1,mediumgreen);
draw(rotate(270, (0,0,1)) * P1,uknot,vknot,weights1,mediumred);
draw(rotate(90, (0,1,0)) * P1,uknot,vknot,weights1,mediumblue);
draw(rotate(-90, (0,1,0)) * rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,mediumyellow);
draw(rotate(-90, (0,1,0)) * rotate(180, (0,0,1)) * P1,uknot,vknot,weights1,mediumgreen);
draw(rotate(90, (0,1,0)) * rotate(270, (0,0,1)) * P1,uknot,vknot,weights1, mediumred);
draw(rotate(-90, (1,0,0)) * P1,uknot,vknot,weights1,yellow);
draw(rotate(-90, (1,0,0)) * rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,mediumblue);
draw(rotate(90, (1,0,0)) * rotate(270, (0,0,1)) * P1,uknot,vknot,weights1,mediumred);
draw(rotate(90, (1,0,0)) * rotate(180, (0,0,1)) * P1,uknot,vknot,weights1, mediumgreen);
答案1
根据这个答案，一种方法是让材料更具“发射性”。我对红色和蓝色做了同样的处理，但保留了绿色和黄色，以说明差异。blues和的定义reds取自这里。
\documentclass[border=3.14mm]{standalone}
\usepackage{asypictureB}
\begin{document}
\begin{asypicture}{name=PatchSphere}
import three;
size(10cm);
settings.render = 1;
settings.antialias = 16;
defaultrender.merge=true;
defaultrender.tessellate=true;
currentlight = light(0,0,400);
currentprojection =
orthographic(0,0,100);
real[] uknot={0,0,0,0,0,1,1,1,1,1};
real[] vknot={0,0,0,0,0,1,1,1,1,1};
triple[][] P1={{
(-29.282032302755088, -29.282032302755088, 29.282032302755088)/5.071796769724491,
(-21.712083963243018, -30.677838684923557, 30.677838684923557)/4.795919436663918,
(-14.391575887554247, -31.571002659693967, 31.571002659693967)/4.6172866417098355,
(-7.195787943777123, -32.017584647079175, 32.017584647079175)/4.527970244232795,
(0.0, -32.017584647079175, 32.017584647079175)/4.527970244232795
},{
(-30.677838684923557, -21.712083963243018, 30.677838684923557)/4.795919436663918,
(-22.869643776777806, -22.869643776777806, 33.02239411869588)/4.494476595178904,
(-15.200184105546917, -23.632006915798854, 34.56287410349287)/4.295770397960685,
(-7.600092052773459, -24.013188485309378, 35.33311409589136)/4.196417299351575,
(0.0, -24.013188485309378, 35.33311409589136)/4.196417299351575
},{
(-31.571002659693967, -14.391575887554247, 31.571002659693967)/4.6172866417098355,
(-23.632006915798854, -15.200184105546917, 34.562874103492874)/4.295770397960685,
(-15.739256250875362, -15.739256250875362, 36.54993607567506)/4.082178134496292,
(-7.869628125437681, -16.008792323539584, 37.54346706176616)/3.975382002764096,
(0.0, -16.008792323539584, 37.54346706176616)/3.975382002764096
},{
(-32.017584647079175, -7.195787943777123, 32.017584647079175)/4.527970244232795,
(-24.013188485309378, -7.600092052773459, 35.33311409589137)/4.196417299351575,
(-16.008792323539584, -7.869628125437681, 37.543467061766165)/3.9753820027640954,
(-8.004396161769792, -8.004396161769792, 38.64864354470356)/3.864864354470356,
(0.0, -8.004396161769792, 38.64864354470356)/3.864864354470356
},{
(-32.017584647079175, 0.0, 32.017584647079175)/4.527970244232795,
(-24.013188485309378, 0.0, 35.33311409589137)/4.196417299351575,
(-16.008792323539584, 0.0, 37.543467061766165)/3.9753820027640954,
(-8.004396161769792, 0.0, 38.64864354470356)/3.864864354470356,
(0.0, 0.0, 38.64864354470356)/3.864864354470356
}
};
// Optional weights:
real[][] weights1={
{5.071796769724491,4.795919436663918,4.6172866417098355,4.527970244232795, 4.527970244232795 },
{4.795919436663918, 4.494476595178904, 4.295770397960685, 4.196417299351575, 4.196417299351575},
{4.6172866417098355, 4.295770397960685, 4.082178134496292, 3.975382002764096, 3.975382002764096},
{4.527970244232795, 4.196417299351575, 3.9753820027640954, 3.9753820027640954, 3.9753820027640954},
{4.527970244232795, 4.196417299351575, 3.9753820027640954, 3.9753820027640954, 3.9753820027640954}
};
material reds = material(diffusepen=0.7red,ambientpen=red,emissivepen=0.3*red,specularpen=0.95white,shininess=0.95);
material blues = material(diffusepen=0.7blue,ambientpen=blue,emissivepen=0.3*blue,specularpen=0.95white,shininess=0.95);
draw(rotate(0, (0,0,1)) * P1,uknot,vknot,weights1,blues);
draw(rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,mediumyellow);
draw(rotate(180, (0,0,1)) * P1,uknot,vknot,weights1,mediumgreen);
draw(rotate(270, (0,0,1)) * P1,uknot,vknot,weights1,reds);
draw(rotate(90, (0,1,0)) * P1,uknot,vknot,weights1,blues);
draw(rotate(-90, (0,1,0)) * rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,mediumyellow);
draw(rotate(-90, (0,1,0)) * rotate(180, (0,0,1)) * P1,uknot,vknot,weights1,mediumgreen);
draw(rotate(90, (0,1,0)) * rotate(270, (0,0,1)) * P1,uknot,vknot,weights1, reds);
draw(rotate(-90, (1,0,0)) * P1,uknot,vknot,weights1,yellow);
draw(rotate(-90, (1,0,0)) * rotate(90, (0,0,1)) * P1,uknot,vknot,weights1,blues);
draw(rotate(90, (1,0,0)) * rotate(270, (0,0,1)) * P1,uknot,vknot,weights1,reds);
draw(rotate(90, (1,0,0)) * rotate(180, (0,0,1)) * P1,uknot,vknot,weights1, mediumgreen);
\end{asypicture}
\end{document}
