Rig an origami bird in After ef­fects

3D Artist - - CONTENTS -

This tu­to­rial will show how the 3D origami bird that’s fea­tured in the award-win­ning Ten­nyson mu­sic video L’oiseau qui danse (which you can watch on Vimeo at bit.ly/loiseauquidanse) was rigged util­is­ing Adobe After ef­fects.

no ex­ter­nal plug­ins are needed, and ev­ery­thing can be done with built-in tools. Although the bird parts are made of a sin­gle solid used sev­eral times with dif­fer­ent masks – they’ve been pre­ren­dered here for prac­ti­cal pur­poses.

The tex­ture was cre­ated with a sim­ple Frac­tal noise ef­fect, but you can use any tex­ture of your choice. in L’oiseau qui danse, a Ja­panese pat­tern tex­ture was used, not only be­cause of de­sign choices, but also to en­hance 3D depth on the pa­per bird.

The rig not only joins the parts to­gether, but also pro­vides au­to­mated be­hav­iour for the en­tire body with each flap of the wings. Only one wing has to be an­i­mated, and ev­ery­thing else will fol­low.

The process fea­tures the use of ex­pres­sions, parenting and the col­lapse Trans­for­ma­tions func­tion. You should al­ready be fa­mil­iar with these tools be­fore start­ing.

Fi­nally, we will cover some quick ren­der tips to help you get nice re­sults right away.

01 Com­po­si­tion setup cre­ate a 1920x1080, 25fps com­po­si­tion. cre­ate a one-node 50mm cam­era. Place it at 0,0,-5000. cre­ate a 3D null called ‘Flap con­troller’ and place it at 0,0,0. Right-click on its po­si­tion set­ting and se­lect ‘sep­a­rate Di­men­sions’. (This will al­low us to ap­ply sep­a­rate ex­pres­sions on the x and y val­ues later). cre­ate a 3D null called ‘cen­tre Bird’, place it at -38,-227,0 and par­ent it to the ‘Flap con­troller’. For preview pur­poses, you can add a cou­ple of lights in the comp.

02

Add ar­tic­u­la­tion points cre­ate a 3D null called ‘Ar­tic­u­la­tion Point head 1’ and place it at 268.5, -400,-69. Par­ent it to the ‘cen­tre Bird’ null. cre­ate a 3D null called ‘Ar­tic­u­la­tion Point head 2’ and place it at 268.5, -400,69. Par­ent it to the ‘cen­tre Bird’ null. cre­ate a 3D null called ‘Ar­tic­u­la­tion Point Body 1’ and place it at -6.6,-17.8, -206.9. cre­ate a 3D null called ‘Ar­tic­u­la­tion Point Body 2’ and place it at -6.1,-17.4,-206.1.

03

Build the bird some lay­ers should cast shad­ows, oth­ers shouldn’t, so there are two dif­fer­ent ma­te­rial op­tions set­tings (see theå image for the step). Re­mem­ber to al­ways place a new layer un­der the oth­ers in the time­line and

switch it to 3D right after adding it. Add the ‘Body_back.png’ layer to the comp. An­chor Point: 232,512,0. Po­si­tion: -86.8,-400.7,0. X ro­ta­tion: 90 de­grees. Y ro­ta­tion: -222.3 de­grees. Par­ent it to the ‘cen­tre Bird’ null. Ma­te­rial Op­tions 1. Add the ‘Bot­tom.png’ layer. Po­si­tion: 294.2,-17,0. X ro­ta­tion: 90 de­grees. Par­ent it to the cen­tre null. Ma­te­rial Op­tions 1.

04

Add the wings Add the ‘Wing_1r.png’ layer. An­chor Point: 1018,1020,0. On the po­si­tion value, add the ex­pres­sion: L = this­comp.layer(“ar­tic­u­la­tion Point Body 1”); P = L.toworld(l.an­chor­point); Ma­te­rial Op­tions 2. Add the “Wing_1l.png” layer. An­chor Point: 1018,1020,0. On the po­si­tion value, add the ex­pres­sion:

L = this­comp.layer(“ar­tic­u­la­tion Point Body 2”);

P = L.toworld(l.an­chor­point);

On the X ro­ta­tion, add the ex­pres­sion: this­comp.layer(“wing_1r.png”).trans­form.xro­ta­tion*-1 Ma­te­rial Op­tions 2. now add the fol­low­ing ex­pres­sions to the Flap con­troller: X Po­si­tion: this­comp.layer(“wing_1r.png”).trans­form. xro­ta­tion/4

Y Po­si­tion: this­comp.layer(“wing_1r.png”).trans­form. xro­ta­tion/-0.8

05

Com­plete the wings Add the ‘Wing_2r.png’ layer. An­chor Point: 1020,1018.6,0. Po­si­tion: -4.7,-17.8,206.9. Y ro­ta­tion: 10 de­grees. Par­ent it to the ‘Wing 1R’ layer. Ma­te­rial Op­tions 2. now we need to add the ‘Wing_2l.png’ layer. An­chor Point: 1020,1018.6,0.

Po­si­tion: -4.2,-17.4,206.1. Y ro­ta­tion: -10 de­grees. Par­ent it to the ‘Wing 1L’ layer. Ma­te­rial Op­tions 2.

06

Add the head Add the ‘head­_1r.png’ layer. An­chor Point: 1024.1,1023.6,0. Po­si­tion: 545.5,-142,0. X ro­ta­tion: 15 de­grees. Z ro­ta­tion: 22.8 de­grees. Par­ent it to the ‘cen­tre Bird’ null. Ma­te­rial Op­tions 2. Add the ‘head­_1l.png’ layer. An­chor Point: 1024.1,1023.6,0. Po­si­tion: 545.5,-142,0. X ro­ta­tion: -15 de­grees. Z ro­ta­tion: 22.8 de­grees. Par­ent it to the ‘cen­tre Bird’ null. Ma­te­rial Op­tions 2. Add the ‘head_2.png’ layer. An­chor Point: 1024.1,512,0. Po­si­tion: 545.5,

-142,0. X ro­ta­tion: 90 de­grees. Y ro­ta­tion: 22 de­grees. Par­ent it to the ‘cen­tre Bird’ null. Ma­te­rial Op­tions 1.

07

Com­plete the body Add the ‘Body_r.png’ layer. An­chor Point: 866.4,613.3,0. Po­si­tion: 268.5,-400,-69. X ro­ta­tion: 20 de­grees. Ma­te­rial Op­tions 2. Par­ent the ‘Ar­tic­u­la­tion Point Body 1’ null to the ‘Body_r.png’ layer. Add the ‘Body_l.png’ layer. An­chor Point: 866.4,613.3,0. Po­si­tion: 268.5,-400,69. X Ro­ta­tion: 20 de­grees. Ma­te­rial Op­tions 2. Par­ent the ‘Ar­tic­u­la­tion Point Body 2’ null to the ‘Body_l.png’ layer.

08

Add the tail Add the ‘Tail_1r.png’ layer. An­chor Point: 1024,1024,0. Po­si­tion: -809.5, -15.6,-207.8. scale: -60.6,60.6,100 per cent. Ori­en­ta­tion: 340 de­grees,0,0. X ro­ta­tion: -25.4 de­grees. Par­ent it to the ‘Body_r.png’ layer. Ma­te­rial Op­tions 2. Add the ‘Tail_1l.png’ layer. An­chor Point: 1024,1024,0. Po­si­tion: -809.5,-15.6,-208.5. scale: -60.6,60.6,100 per cent. Ori­en­ta­tion: 20 de­grees,0,0. X ro­ta­tion: 25.4 de­grees. Par­ent it to the ‘Body_l.png’ layer. Ma­te­rial Op­tions 2. Add the ‘Tail_2.png’ layer. An­chor Point: 1024.1,512,0. Po­si­tion: -804.7,-218.3,-3.3. X ro­ta­tion: 90 de­grees. Y ro­ta­tion: 198.2 de­grees. Then par­ent it to the cen­tre Bird layer. Ma­te­rial Op­tions 1.

09

Ready to fly On the ‘Wing_1r.png’ X Ro­ta­tion, add a 10-de­gree keyframe on frame 0, a 140-de­gree keyframe on frame 4 and a 10-de­gree keyframe again on frame 11. se­lect all keyframes, go to An­i­ma­tion>keyframe As­sis­tant and se­lect easy ease. Loop this se­quence. cre­ate a 1920x1080 comp, drop the ‘Bird’ comp in, ac­ti­vate its 3D and ‘col­lapse Trans­for­ma­tions’ switches to keep its prop­er­ties. An­chor Point: -139,-314,0. Po­si­tion: 0,0,0. scale: 11 per cent. cre­ate a cam­era, and your bird is ready to be an­i­mated.

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