CN102609553B - Method for drawing computer-assisted animation modeling - Google Patents
Method for drawing computer-assisted animation modeling Download PDFInfo
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- CN102609553B CN102609553B CN 201110026913 CN201110026913A CN102609553B CN 102609553 B CN102609553 B CN 102609553B CN 201110026913 CN201110026913 CN 201110026913 CN 201110026913 A CN201110026913 A CN 201110026913A CN 102609553 B CN102609553 B CN 102609553B
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Abstract
The invention relates to a method for drawing a computer-assisted animation modeling, wherein joints drawn by a computer graphic method are connected to form a framework through a skeleton, the positions and orientations of various parts of the animation modeling are positioned through positioning balls attached to the joints, and a modeling structure chart is simulated in the process of drawing the animation modeling so as to realize animation modeling drawing basis on a plane. By the method, various visual elements such as structure, perspective, exaggeration, deformation and the like of the modeling under multiple angles are unified, and the design skill and production quality are improved.
Description
Technical field
The present invention relates to a kind of computer assisted animation method for designing, relate in particular a kind of computer assisted animation method for designing of cartoon role design.
Background technology
In traditional 2 D animation, complete the drafting of the kinematic modeling design, the moulding of camera lens original painting etc. of role modelling, be substantially by the animation teacher according to corresponding role's design, with its understanding for the role, animation grounding in basic skills and experience, complete.For the animation experience, be not that very sufficient and role understands be not very well animation teacher, the moulding of drawing, former animation generation " out of shape " (shape departs from original moulding) can hardly be avoided.
The process that following a series of figure are existing manual drawing moulding:
A, as Figure 18, sketch the contours the position of health major part, buttocks, thoracic cavity and head, then use linear perspective show personage's health head and buttocks towards.
B, as Figure 19, in position and joint, the junction size of the position of thoracic cavity and buttocks mark four limbs.
C, as Figure 20, draw the shape of four limbs on definite joint position at b, and the joint position of four limbs.
D, as Figure 21, draw the shape of four limbs on definite joint position at b, and the joint position of four limbs.
Merge the step of abcd, shown in Figure 22, generally, shape-designing Shi Heyuan painter can complete this 4 steps on a piece of paper, and the personnel that transfer to clean copy carry out following step.
E, as Figure 23, by shape-designing person or clean copy personnel, top drawn moulding is carried out to clean copy on an other animation paper, be exactly that burr unnecessary in design process and lines are removed, only stay personage's main wheel profile and towards sign.
F, as Figure 24, use the thinner pencil of nib to carry out clean copy again, the draft line color cleared like this is deep, more clear.
G, as Figure 25, some otiose lines in f (towards lines and location lines) are removed, finally become a design original text, for the next link of animation production, go.
As shown in top figure, the design process that completes moulding needs many people to participate in, and actual animation is many more than the moulding complexity in example of drawn moulding in producing, and these many people affect for the understanding of moulding, the level of design and other some factors, the original idea that has just had the lines of some moulding to break away from the deviser in the design phase.In 2 D animation is produced, in general personnel's artistic level of doing shape-designing is high, but the understanding for animated character's action is relatively poor, if need to design some non-standard need to for significantly the action the design original text, the more difficult design of shape-designing personnel puts in place so, understand deep original painting personnel artistic level in shape-designing and do not reach requirement and move for the animated character, then just occurred 2 D animation produce in common " race type " phenomenon.
And at present computer technology is widely used in animation process, some other assistance modeling method for drafting (as: 3DMax, Maya etc.) can not well be applicable to the actual demand of 2 D animation design and production.Due to the artistic exaggeration that 2 D animation has, use the method for drafting of existing these assistance modelings to draw the needs that can not well meet shape-designing and film-making.
Summary of the invention
The present invention provides the cartoon sculpting method of a specialty system for the cartoon sculpting teacher, the design drawing form of " modeling structure ball " that the method is familiar with the cartoon sculpting teacher, offer the cartoon sculpting teacher with printer print paper (or screen is painted), joint and bone comprising people/animal, with them, each key point of moulding is made to location, the cartoon sculpting teacher still uses containing the animation paper in positioning rule hole and is created, artistic style and characteristics while in production process, due to the location of joint and bone, making the people of creation/animal keep initial design.Use the image scanning apparatus scanning animation paper formation image file input computing machines such as scanner after having created.The method has guaranteed the unification of each vision key elements such as the moulding structural relation lower in a plurality of moulding faces (front, the back side, left surface, right flank, left 3/4, right 3/4,3/4 of the left back of the body, 3/4 of the right back of the body etc.), angle (look up, face, overlook etc.), posture (walk, run, jump, crouching etc.), perspective view, exaggeration degree, amplitude of deformation, has improved the art and the quality of production that design.
Technical scheme of the present invention is: design a kind of computer assisted animation method for designing, by computing machine, printer, scanning device, image recognition apparatus as auxiliary input, output instrument, initial cartoon role moulding based on animation's teacher design realizes the unified cartoon role moulding of a plurality of and initial cartoon role shaping style, it is characterized in that comprising the following steps:
A, in the animation original text, put or generate place kick between cartoon role moulding bone, the initial position of described place kick is determined by joint position or the moving position of cartoon role, the initial size of described place kick determines by the ratio between the moulding of cartoon role size, each position and integral body, described place kick initial towards the moulding by cartoon role towards decision; The initial three-dimensional properties of described place kick and original state are defined according to known animation action norm;
B, implicit design rough sketch, the position by regulating place kick, size and towards, generate new moulding posture, connect the bone length of place kick according to the variation naturally of the distance between place kick;
The skeleton of C, new cartoon role can utilize computing machine, printer output, the designer can draw according to the characteristics of new cartoon role skeleton and the place kick moulding of depending on thereof the moulding rough sketch made new advances, steps A～C repeats for many times, can obtain the unified cartoon role design rough sketch of multiple styles.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle;
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Utilize the actual joint position positioning joint point of computing machine at cartoon role;
Connect articulation point, form a set of bone of cartoon role;
In articulation point, place kick is put at place.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle;
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Articulation point according to the cartoon role moulding at blank space location role modelling;
Place kick is placed in to the articulation point place;
The moulding of cartoon role is covered and is superimposed in place kick;
Connect place kick, form a set of bone of cartoon role.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Use sensor or image recognition apparatus to identify the action of existing cartoon role, automatic positioning joint point, and produce a set of bone;
Place kick is carried in to the articulation point place of corresponding site.
The three-dimensional properties of place kick and state described in described steps A are defined and refer in Computer Database character moulding and animal-shaped action are carried out to digitized description according to known animation action norm.
Described character moulding action definition comprises the walking of people, runs, the corresponding digitized description of Computer Database of jump action;
Animal-shaped action definition comprises:
Walk the walking of beasts, run, flutter the corresponding digitized description in the Computer Database of doing of beating;
The walking of poultry, circle in the air, the corresponding digitized description in the database of jump action;
Corresponding digitized description in the database of the action of creeping of reptile.
In described step B, " generate new moulding posture, the bone length that connects place kick changes naturally according to the distance between place kick " observes following rule:
(a) rule of bone length and angle in setting cartoon role skeleton;
(b) set the constraint condition of cartoon role normal range;
(c) regulation rule (b) is set the constraint condition of cartoon role exaggeration range of movement.
Described step (a) is set in the cartoon role skeleton rule of length and angle between bone and is comprised:
The definition of preset coordinate system: the horizontal level of animation paper is X-axis, and the pedal line of center of gravity becomes 90 degree in X-axis;
Preset reference length: datum length is exactly a standard length;
At first find the center of gravity of cartoon sculpting when standing position, the pedal line by this center of gravity is set as the benchmark bone, i.e. one-level father bone;
Secondly, the one-level father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of one-level, and the sub-bone of one-level is also secondary father bone simultaneously;
Again, the secondary father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of secondary, and the sub-bone of secondary is also three grades of father's bones simultaneously, by that analogy, the bone of cartoon sculpting is formed to a kind of tree structure structural drawing of classification;
Setting each root bone is θ with respect to the angle of X-axis, and the length of sub-bone is that datum length is multiplied by coefficient a, resets the span of θ and a;
The junction of bone and bone is exactly the position of putting place kick.
The constraint condition that described step (b) is set the cartoon role normal range comprises:
Amplitude of fluctuation, direction setting parameter according to sub-bone with respect to father's bone, by amplitude and the scope to the constrained parameter action.
The constraint condition that described step (c) is set cartoon role exaggeration range of movement comprises:
Adjust parameter according to sub-bone with respect to amplitude of fluctuation, the direction setting of father's bone, by adjusting parameter value, enlarging cartoon role motion amplitude and scope, role action exaggerated deformation.
After described known animation action norm definition digitized processing, be stored in database, the record generated in the constraint based on database of new cartoon role skeleton generates automatically.
" three-dimensional properties of described place kick and state are defined according to known animation action norm " in technical scheme is based on the common practise of plastic arts, and for example running of people have following rule:
---crotch's joint drive left and right shank and foot bones and joint alternately travel forward, and drive skeleton trunci and joint and travel forward;
---left leg and left foot bone and joint are to motion during the place ahead, and right arm bone and right arm joint swing towards the walking rear simultaneously; Right leg and right crus of diaphragm bone and joint are to motion during the place ahead, and left arm bone and left arm joint swing towards the walking rear simultaneously;
---the bone that left and right arms is some upper arm and forearm from elbow joint during swing at the volley becomes bending;
---in the process that travels forward; the height of head skeleton and place kick becomes wavy; when the state of the shank bone contacted with ground of body support skeleton and joint Cheng Zhi; head skeleton and place kick top are slightly high; when the shank bone contacted with ground of body support skeleton becomes crooked state with joint, head skeleton and place kick top are lower slightly;
---in proal process, bone and the joint of that striding leg, from liftoff to stretching and land forward, middle knee joint becomes bending, ankle position articulation center and the ground camber line of motion.The angle that knee joint bends and stretches is greater than the action of walking;
---in the motion of running, the process that the bone of both feet and joint do not land simultaneously
As Figure 12 is a width or the frame in running.
" generate new moulding posture, the bone length that connects place kick changes naturally according to the distance between place kick " described in technical scheme observes the action rule of people and animal carried out to a whole set of step and technical standard and the data that draw after digitized processing:
The first step: set skeleton
The definition of preset coordinate system: the horizontal level of animation paper is X-axis, and the pedal line of center of gravity becomes 90 degree in X-axis
Preset reference length: datum length is exactly a standard length
A. at first find the center of gravity of cartoon sculpting when the incipient stability posture, the pedal line by this center of gravity is set as the benchmark bone, i.e. one-level father bone;
B. the one-level father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of one-level, and the sub-bone of one-level is also secondary father bone simultaneously;
C. similar with b, the secondary father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of secondary, and the sub-bone of secondary is also three grades of father's bones simultaneously, by that analogy, the bone of cartoon sculpting is formed to a kind of tree structure structural drawing of classification;
D. setting each root bone is θ with respect to the angle of X-axis, and the length of sub-bone is that datum length is multiplied by coefficient a, take ordinary people's stature as example, and the parameter of all bones is as shown in table 1:
| Father's bone name | The bone name | a | θ (degree) |
| Center of gravity line | The abdomen bone | 0.7 | 90 |
| The abdomen bone | The |
1 | 90 |
| The pelvic bone bone | The breastbone bone | 0.5 | 90 |
| The breastbone bone | The neck bone | 0.5 | 90 |
| The neck bone | The |
1 | 90 |
| The breastbone bone | Right omoplate bone | 0.8 | 160 |
| Right omoplate bone | Right upper arm | 1.2 | 245 |
| Right upper arm | The bottom right arm | 1.3 | 245 |
| The bottom right arm | The right hand palm | 0.5 | 270 |
| The breastbone bone | Left omoplate bone | 0.8 | 20 |
| Left omoplate bone | Left upper arm | 1.2 | -65 |
| Left upper arm | The lower-left arm | 1.3 | -65 |
| The lower-left arm | The left hand palm | 0.5 | 270 |
| The abdomen bone | Right hipbone | 0.8 | 225 |
| Right hipbone | The upper right leg | 1.65 | 260 |
| The upper right leg | The bottom right leg | 2 | 260 |
| The bottom right leg | Right crus of diaphragm | 0.5 | 200 |
| The abdomen bone | Left hipbone | 0.8 | 315 |
| Left hipbone | Upper left leg | 1.65 | 280 |
| Upper left leg | Left lower leg | 2 | 280 |
| Left lower leg | Left foot | 0.5 | -20 |
Table 1
E. a class cartoon sculpting framework construction completes, and the junction of bone and bone is exactly the position of putting place kick.As shown in Figure 16,17, the dotted portion in figure except center of gravity line means to be a bone group herein, several bones or several bones, consist of, but their activities is movable together, so can be used as a bone, goes to process.Respectively right omoplate bone, the right hipbone of left omoplate bone, left hipbone from top to bottom.
Second step: cartoon role normal range constraint
According to the skeleton of the first step, create, each root bone has own unique father's bone.We can be according to sub-bone with respect to the restrictions on the parameters such as the amplitude of fluctuation of father's bone, direction action, to reach our needed standard.Sub-bone is with respect to (the depth constraint that front and back are space all around of father's bone, left and right is the constraint on plane) moved, for a class cartoon sculpting, within the scope of constraint, sub-bone can freely be put according to the needs of moulding, extend to whole skeleton, just can retrain the motion of all bones in skeleton.Normal action can not exceed this scope, but has unconventional action and exaggeration action, and this part action is described in the 3rd step.
In following table, be the sub-bone determined of a normal character moulding with respect to father's bone movement range all around
Unit: degree
| Father's bone name | The bone name | With respect to father's bone forward direction amplitude | With respect to the backward amplitude of father's bone | With respect to father's bone left-hand amplitude | With respect to father's bone dextrad amplitude |
| Center of gravity line | The abdomen bone | 120 | 90 | 50 | 50 |
| The abdomen bone | The pelvic bone bone | 180 | 120 | 50 | 50 |
| The pelvic bone bone | The breastbone bone | 60 | 60 | 25 | 25 |
| The breastbone bone | The neck bone | 120 | 120 | 75 | 75 |
| The neck bone | The skull bone | 30 | 30 | 30 | 30 |
| The breastbone bone | Right omoplate bone | 60 | 60 | 60 | 60 |
| Right omoplate bone | Right upper arm | 180 | 180 | 120 | 180 |
| Right upper arm | The bottom right arm | 180 | 0 | 160 | 12 |
| The bottom right arm | The right hand palm | 90 | 90 | 90 | 90 |
| The breastbone bone | Left omoplate bone | 60 | 60 | 60 | 60 |
| Left omoplate bone | Left upper arm | 180 | 180 | 180 | 120 |
| Left upper arm | The lower-left arm | 180 | 0 | 12 | 160 |
| The lower-left arm | The left hand palm | 90 | 90 | 90 | 90 |
| The abdomen bone | Right hipbone | 30 | 30 | 30 | 30 |
| Right hipbone | The upper right leg | 180 | 120 | 45 | 180 |
| The upper right leg | The bottom right leg | 0 | 180 | 75 | 12 |
| The bottom right leg | Right crus of diaphragm | 120 | 90 | 60 | 60 |
| The abdomen bone | Left hipbone | 30 | 30 | 30 | 30 |
| Left hipbone | Upper left leg | 180 | 120 | 180 | 45 |
| Upper left leg | Left lower leg | 0 | 180 | 12 | 75 |
| Left lower leg | Left foot | 120 | 90 | 60 | 60 |
Table 2
The 3rd step: cartoon role exaggeration range of movement constraint
What in the second step table, describe is the motion amplitude of sub-bone with respect to father's bone, in this amplitude, with interior sub-bone, can freely put according to the actual needs, when doing artistic exaggeration, this cover constraint condition may be not suitable with in subrange, not there will be for whole modeling skeleton inapplicable, in general there are the needs of exaggerating in the joint that is several keys of skeleton, we can increase an exaggeration variable in the number of degrees scope of second step constraint so, we set this variable is γ, normal range plus-minus γ, for realizing the needs of exaggeration, and the setting of γ numerical value needs animation teacher and hairstylist, according to the actual features of cartoon sculpting and industry, the common recognition to this type of moulding determines.
We also take a common people to make example, and there are neck, left and right arms, left and right leg and left and right pin in the position that generally can make the exaggerated deformation action in the form in second step, and form can be modified to so
Unit: degree
| Father's bone name | The bone name | With respect to father's bone forward direction amplitude | With respect to the backward amplitude of father's bone | With respect to father's bone left-hand amplitude | With respect to father's bone dextrad amplitude |
| Center of gravity line | The abdomen bone | 120±γ | 90±γ | 50±γ | 50±γ |
| The abdomen bone | The pelvic bone bone | 180±γ | 120±γ | 50±γ | 50±γ |
| The pelvic bone bone | The breastbone bone | 60 | 60 | 25 | 25 |
| The breastbone bone | The neck bone | 120±γ | 120±γ | 75±γ | 75±γ |
| The neck bone | The skull bone | 30 | 30 | 30 | 30 |
| The breastbone bone | Right omoplate bone | 60±γ | 60±γ | 60±γ | 60±γ |
| Right omoplate bone | Right upper arm | 180±γ | 180±γ | 120±γ | 180±γ |
| Right upper arm | The bottom right arm | 180 | 0 | 160 | 12 |
| The bottom right arm | The right hand palm | 90 | 90 | 90 | 90 |
| The breastbone bone | Left omoplate bone | 60±γ | 60±γ | 60±γ | 60±γ |
| Left omoplate bone | Left upper arm | 180±γ | 180±γ | 180±γ | 120±γ |
| Left upper arm | The lower-left arm | 180 | 0 | 12 | 160 |
| The lower-left arm | The left hand palm | 90 | 90 | 90 | 90 |
| The abdomen bone | Right hipbone | 30±γ | 30±γ | 30±γ | 30±γ |
| Right hipbone | The upper right leg | 180±γ | 120±γ | 45±γ | 180±γ |
| The upper right leg | The bottom right leg | 0 | 180 | 75 | 12 |
| The bottom right leg | Right crus of diaphragm | 120 | 90 | 60 | 60 |
| The abdomen bone | Left hipbone | 30±γ | 30±γ | 30±γ | 30±γ |
| Left hipbone | Upper left leg | 180±γ | 120±γ | 180±γ | 45±γ |
| Upper left leg | Left lower leg | 0 | 180 | 12 | 75 |
| Left lower leg | Left foot | 120 | 90 | 60 | 60 |
Table 3
γ may have the different situation of correction variable γ of each root bone in a moulding, so may need to be divided into γ 1, γ 2, γ 3, γ 4 etc.
Be more than all human body for example, animal body and other moulding can be overlapped rule according to this and be retrained;
These normalized definitions are stored in database after digitized processing, and the record generated in the constraint based on database of new cartoon role skeleton generates automatically.
And whole technical scheme can utilize computing machine, printer, scanning device, image recognition apparatus as aid, improve the efficiency of moulding work.
The accompanying drawing explanation
Fig. 1 is conventional shape-designing legend;
Fig. 2, Fig. 3 are the bone legends;
Fig. 4, Fig. 5 are the skeletal graphs of having hidden the standard moulding;
Fig. 6, Fig. 7, Fig. 8, Figure 12 are the skeletal graphs that has added place kick;
Fig. 9, Figure 10, Figure 11 are the design drawings that has recovered the standard moulding;
Figure 13, Figure 14, Figure 15 are the design drawings through modifying;
Figure 16, Figure 17 are that the cartoon sculpting framework construction completes figure;
Figure 18-Figure 25 is the process of existing manual drawing moulding.
Embodiment
Below in conjunction with Figure of description, embodiment is described.
Design a kind of computer assisted animation method for designing, by computing machine, printer, scanning device, image recognition apparatus as auxiliary input, output instrument, initial cartoon role moulding based on animation's teacher design realizes the unified cartoon role moulding of a plurality of and initial cartoon role shaping style, it is characterized in that comprising the following steps:
A, in the animation original text, put or generate place kick between cartoon role moulding bone, the initial position of described place kick is determined by joint position or the moving position of cartoon role, the initial size of described place kick determines by the ratio between the moulding of cartoon role size, each position and integral body, described place kick initial towards the moulding by cartoon role towards decision; The initial three-dimensional properties of described place kick and original state are defined according to known animation action norm; As Fig. 6, Fig. 7, Fig. 8, Figure 12;
B, implicit design rough sketch, the position by regulating place kick, size and towards, generate new moulding posture, connect the bone length of place kick according to the variation naturally of the distance between place kick;
The skeleton of C, new cartoon role can utilize computing machine, printer output, the designer can draw according to the characteristics of new cartoon role skeleton and the place kick moulding of depending on thereof the moulding rough sketch made new advances, steps A～C repeats for many times, can obtain the unified cartoon role design rough sketch of multiple styles, as Fig. 9, Figure 10, Figure 11; Can further draw needed moulding rough sketch, as Figure 13, Figure 14, Figure 15.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle; As Fig. 1,
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Utilize the actual joint position positioning joint point of computing machine at cartoon role; As Fig. 2, Fig. 3, Fig. 4, Fig. 5;
Connect articulation point, form a set of bone of cartoon role;
In articulation point, place kick is put at place.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle; As Fig. 1,
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Articulation point according to the cartoon role moulding at blank space location role modelling; As Fig. 2, Fig. 3, Fig. 4, Fig. 5;
Place kick is placed in to the articulation point place;
The moulding of cartoon role is covered and is superimposed in place kick;
Connect place kick, form a set of bone of cartoon role.
" between cartoon role moulding bone, putting or generate place kick " in described steps A comprises the following steps:
Use sensor or image recognition apparatus to identify the action of existing cartoon role, automatic positioning joint point, and produce a set of bone; As Fig. 2, Fig. 3, Fig. 4, Fig. 5;
Place kick is carried in to the articulation point place of corresponding site.
The three-dimensional properties of place kick and state described in described steps A are defined and refer in Computer Database character moulding and animal-shaped action are carried out to digitized description according to known animation action norm.
Described character moulding action definition comprises the walking of people, runs, the corresponding digitized description of Computer Database of jump action;
Animal-shaped action definition comprises:
Walk the walking of beasts, run, flutter the corresponding digitized description in the Computer Database of doing of beating;
The walking of poultry, circle in the air, the corresponding digitized description in the database of jump action;
Corresponding digitized description in the database of the action of creeping of reptile.
In described step B, " generate new moulding posture, the bone length that connects place kick changes naturally according to the distance between place kick " observes following rule:
(a) rule of bone length and angle in setting cartoon role skeleton;
(b) set the constraint condition of cartoon role normal range;
(c) regulation rule (b) is set the constraint condition of cartoon role exaggeration range of movement.
Described step (a) is set in the cartoon role skeleton rule of length and angle between bone and is comprised:
The definition of preset coordinate system: the horizontal level of animation paper is X-axis, and the pedal line of center of gravity becomes 90 degree in X-axis;
Preset reference length: datum length is exactly a standard length;
At first find the center of gravity of cartoon sculpting when standing position, the pedal line by this center of gravity is set as the benchmark bone, i.e. one-level father bone;
Secondly, the one-level father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of one-level, and the sub-bone of one-level is also secondary father bone simultaneously;
Again, the secondary father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of secondary, and the sub-bone of secondary is also three grades of father's bones simultaneously, by that analogy, the bone of cartoon sculpting is formed to a kind of tree structure structural drawing of classification;
Setting each root bone is θ with respect to the angle of X-axis, and the length of sub-bone is that datum length is multiplied by coefficient a, resets the span of θ and a;
The junction of bone and bone is exactly the position of putting place kick.
The constraint condition that described step (b) is set the cartoon role normal range comprises:
Amplitude of fluctuation, direction setting parameter according to sub-bone with respect to father's bone, by amplitude and the scope to the constrained parameter action.
The constraint condition that described step (c) is set cartoon role exaggeration range of movement comprises:
Adjust parameter according to sub-bone with respect to amplitude of fluctuation, the direction setting of father's bone, by adjusting parameter value, enlarging cartoon role motion amplitude and scope, role action exaggerated deformation.
After described known animation action norm definition digitized processing, be stored in database, the record generated in the constraint based on database of new cartoon role skeleton generates automatically.
The present invention is directed to inevitably " out of shape " problem of original painting design institute that dynamically reaches of traditional 2 D animation role modelling, operating and producing by the artist on the basis of high-quality animation figure, simulate traditional cartoon sculpting and original painting method for designing thereof, instruct and correct moulding and original painting design process thereof, produce as far as possible correct design original text, improved the throughput rate in animation field.
Claims (10)
1. a computer assisted animation method for designing, by computing machine, printer, scanning device, image recognition apparatus as auxiliary input, output instrument, initial cartoon role moulding based on animation's teacher design realizes the unified cartoon role moulding of a plurality of and initial cartoon role shaping style, it is characterized in that comprising the following steps:
A, in the animation original text, put or generate place kick between cartoon role moulding bone, the initial position of described place kick is determined by joint position or the moving position of cartoon role, the initial size of described place kick determines by the ratio between the moulding of cartoon role size, each position and integral body, described place kick initial towards the moulding by cartoon role towards decision; The initial three-dimensional properties of described place kick and original state are defined according to known animation action norm;
B, implicit design rough sketch, the position by regulating place kick, size and towards, generate new moulding posture, the bone length that connects place kick changes naturally according to the distance between place kick, this step is observed regular as follows:
(a) rule of bone length and angle in setting cartoon role skeleton;
(b) set the constraint condition of cartoon role normal range;
(c) regulation rule (b) is set the constraint condition of cartoon role exaggeration range of movement;
The skeleton of C, new cartoon role can utilize computing machine, printer output, the designer can draw according to the characteristics of new cartoon role skeleton and the place kick moulding of depending on thereof the moulding rough sketch made new advances, steps A～C repeats for many times, can obtain the unified cartoon role design rough sketch of multiple styles.
2. computer assisted animation method for designing according to claim 1 is characterized in that: " between cartoon role moulding bone, put or generate place kick " in described steps A and comprise the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle;
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Utilize the actual joint position positioning joint point of computing machine at cartoon role;
Connect articulation point, form a set of bone of cartoon role;
In articulation point, place kick is put at place.
3. computer assisted animation method for designing according to claim 1 is characterized in that: " between cartoon role moulding bone, put or generate place kick " in described steps A and comprise the following steps:
Complete one or several cartoon role shape-designing by the designer, the design rough sketch be take and looked squarely front pose as main, also can required design becomes the moulding at other visual angle;
Above-mentioned design rough sketch is passed through to the scanning device scanning input computer, if the designer is the design rough sketch directly completed on computers can ignores this step;
Articulation point according to the cartoon role moulding at blank space location role modelling;
Place kick is placed in to the articulation point place;
The moulding of cartoon role is covered and is superimposed in place kick;
Connect place kick, form a set of bone of cartoon role.
4. computer assisted animation method for designing according to claim 1 is characterized in that: " between cartoon role moulding bone, put or generate place kick " in described steps A and comprise the following steps:
Use sensor or image recognition apparatus to identify the action of existing cartoon role, automatic positioning joint point, and produce a set of bone;
Place kick is carried in to the articulation point place of corresponding site.
5. according to claim 2 or 3 or 4 described computer assisted animation methods for designing, it is characterized in that:
The three-dimensional properties of place kick and state described in described steps A are defined and refer in Computer Database character moulding and animal-shaped action are carried out to digitized description according to known animation action norm.
6. computer assisted animation method for designing according to claim 5 is characterized in that:
Described character moulding action definition comprises the walking of people, runs, the corresponding digitized description of Computer Database of jump action;
Animal-shaped action definition comprises:
Walk the walking of beasts, run, flutter the corresponding digitized description in the Computer Database of doing of beating;
The walking of poultry, circle in the air, the corresponding digitized description in the database of jump action;
Corresponding digitized description in the database of the action of creeping of reptile.
7. computer assisted animation method for designing according to claim 6 is characterized in that: described step (a) is set in the cartoon role skeleton rule of length and angle between bone and is comprised:
The definition of preset coordinate system: the horizontal level of animation paper is X-axis, and the pedal line of center of gravity becomes 90 degree in X-axis;
Preset reference length: datum length is exactly a standard length;
At first find the center of gravity of cartoon sculpting when standing position, the pedal line by this center of gravity is set as the benchmark bone, i.e. one-level father bone;
Secondly, the one-level father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of one-level, and the sub-bone of one-level is also secondary father bone simultaneously;
Again, the secondary father bone of take is benchmark, and the immediate bone of associated is set as to the sub-bone of secondary, and the sub-bone of secondary is also three grades of father's bones simultaneously, by that analogy, the bone of cartoon sculpting is formed to a kind of tree structure structural drawing of classification;
Setting each root bone is θ with respect to the angle of X-axis, and the length of sub-bone is that datum length is multiplied by coefficient a, resets the span of θ and a;
The junction of bone and bone is exactly the position of putting place kick.
8. computer assisted animation method for designing according to claim 7 is characterized in that: the constraint condition that described step (b) is set the cartoon role normal range comprises:
Amplitude of fluctuation, direction setting parameter according to sub-bone with respect to father's bone, by amplitude and the scope to the constrained parameter action.
9. computer assisted animation method for designing according to claim 8 is characterized in that: the constraint condition that described step (c) is set cartoon role exaggeration range of movement comprises:
Adjust parameter according to sub-bone with respect to amplitude of fluctuation, the direction setting of father's bone, by adjusting parameter value, enlarging cartoon role motion amplitude and scope.
10. computer assisted animation method for designing according to claim 9, it is characterized in that: after described known animation action norm definition digitized processing, be stored in database, the record in the constraint based on database of new cartoon role skeleton generates automatically.
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| US9230294B2 (en) * | 2013-03-15 | 2016-01-05 | Dreamworks Animation Llc | Preserving and reusing intermediate data |
| CN103177466A (en) * | 2013-03-29 | 2013-06-26 | 龚南彬 | Animation producing device and system |
| CN104167008B (en) * | 2013-05-19 | 2017-12-15 | 上海创翼动漫科技有限公司 | A kind of multimedia animation generates system and method |
| CN105205849A (en) * | 2015-10-19 | 2015-12-30 | 北京白鹭时代信息技术有限公司 | Method and device for establishing tree discrete bone structure |
| CN106201559A (en) * | 2016-08-24 | 2016-12-07 | 合肥凌翔信息科技有限公司 | A kind of graphical programming software |
| CN112132932B (en) * | 2020-09-02 | 2021-04-27 | 苏州好玩友网络科技有限公司 | Automatic sequence diagram generation method and device |
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| CN1277392A (en) * | 1999-06-11 | 2000-12-20 | 迫斯娱乐股份有限公司 | Three-dimensional cartoon producing system and method |
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