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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
4 A: K3 d! o) c7 d6 J- importPackage (java.lang);7 e" }- }3 H- f- W% S9 q1 |
- importPackage (java.awt);* w5 l6 R5 u; Z! b2 r5 ]5 W m! c
- ! J6 A# s/ P! g
- include(Resources.id("mtrsteamloco:library/code/face.js"));& Q& _! W: H' P
$ e" W. x% n( P) B( @) z) I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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' P+ U! [3 u& w6 n% a+ Q' w' [" {# o- function getW(str, font) {% B* N1 |/ w4 ?' K, \( \ v
- let frc = Resources.getFontRenderContext();
5 E4 V+ g4 R& ^( M/ { - bounds = font.getStringBounds(str, frc);5 o0 i/ ~- J# c8 E
- return Math.ceil(bounds.getWidth());' X2 H/ v7 j( \! [) V
- }
& \' ?. k% f) a0 q! y6 ^$ u0 ] - ' M8 N Y9 u" ?" k+ n1 |9 C
- da = (g) => {//底图绘制
/ p9 Z4 ]! y# |/ ~ - g.setColor(Color.BLACK);9 I Z3 M) }- b* v
- g.fillRect(0, 0, 400, 400);2 N/ e' F5 |: J5 ]( q3 u
- }1 V+ x& V$ v5 I$ U, l
- 1 k# O; ?2 K8 s% K: i ?
- db = (g) => {//上层绘制
# V7 c- a0 G' d/ w4 T2 c - g.setColor(Color.WHITE);* Q+ |1 }( F# i+ @2 c& p
- g.fillRect(0, 0, 400, 400);! N" s$ j" T7 J5 @) W
- g.setColor(Color.RED);4 B4 ^3 s5 Q5 _, D* `' g: T- g
- g.setFont(font0);
! |* K7 T. Y6 E. {) Q* S - let str = "晴纱是男娘";, a# a' @4 F: s2 Y9 a; @$ X$ Q
- let ww = 400;' X) L \" M+ J: C4 A- u2 O
- let w = getW(str, font0);0 G5 p4 Z0 y1 M4 T
- g.drawString(str, ww / 2 - w / 2, 200);
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% {; a6 Y6 p# A2 Y" I% B- const mat = new Matrices();
" s/ E; ^+ L0 M3 e* m. ?6 M* x/ c - mat.translate(0, 0.5, 0);
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1 m1 D: `; f1 M1 r; E" p- function create(ctx, state, entity) {
! h; C( ^: Z5 q9 X - let info = { E7 E# [4 O" w t2 w
- ctx: ctx,! v) J1 C* g* G0 N
- isTrain: false, B7 P1 L0 w" |: e" _
- matrices: [mat],, g- f! O5 W1 O3 i
- texture: [400, 400],
$ t$ {: X" y% [ - model: {; W8 J1 W! R) F( o! ?/ c
- renderType: "light",- e; E7 @/ g* c! W) F
- size: [1, 1],3 h2 g/ Y+ c* J9 a; r% K) n* ]* G
- uvSize: [1, 1]
% |$ P! K/ Z" K& Y" Y/ V - }, Y* l" b0 ]/ c% ?/ H% W: h/ x! }
- }& h& C8 q/ A a- @9 j
- let f = new Face(info);. q9 |/ o: {" ]
- state.f = f;
1 J+ L1 C1 w. F1 P# g
Z& B) \& {( X+ S- let t = f.texture;
4 W$ u( T5 m9 J, H R: k - let g = t.graphics;( q p- ?+ R( Z
- state.running = true;
0 B d9 u3 A5 Z3 K5 I4 E+ {) s: Y - let fps = 24;
$ | b% H) b4 T J/ o' K6 M - da(g);//绘制底图
, r( F- S0 H8 p" H - t.upload();. t% a( O9 C' R' X7 P3 m1 L
- let k = 0;
: E( P2 d/ A* g0 ^+ b+ d - let ti = Date.now();
0 m2 k- `% w' f* O% \) I) B: Y/ ^ - let rt = 0;
g0 F0 M8 S+ A- H% N - smooth = (k, v) => {// 平滑变化; f+ U+ K' k+ Q8 ]& s2 `$ y
- if (v > k) return k;
: b& ~4 v3 g' l% k) R W6 q - if (k < 0) return 0;
1 E, i9 `$ `, b$ u- i& K - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: B& J: ~+ t$ ?' F7 M4 h - }
" H4 p3 o5 ~ q/ e0 J1 r - run = () => {// 新线程/ `9 V' u. F2 g. n1 w& [
- let id = Thread.currentThread().getId();2 }" B. x4 `3 e
- print("Thread start:" + id);( ?( p5 K- c% I# K( M# `
- while (state.running) {8 f- R! q* ~) s& Z
- try {; I; a7 Y. C3 n3 y, B; m; N) I# e3 |
- k += (Date.now() - ti) / 1000 * 0.2;* {4 x, s0 M3 i# v, G9 [
- ti = Date.now();
2 I! u# i; b& Z s - if (k > 1.5) {
9 d* f" V. o0 u; O# f5 ` - k = 0;. D* ~6 C! h9 a: m! y" T- R
- }
1 @/ L* B' [/ l# w: i- A - setComp(g, 1);: z, ^2 `: s; o
- da(g);
+ C( F/ f( u3 O# U2 z) n0 W# u( @ - let kk = smooth(1, k);//平滑切换透明度; A" D" E9 p1 n7 Z8 I* H+ P
- setComp(g, kk);2 C4 y: [6 S/ F1 r! ^9 m
- db(g);# t8 n0 \* ?+ |; U( O
- t.upload();
1 a' F- o5 b/ t0 ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);1 u* @0 o$ ^6 f
- ctx.setDebugInfo("k", k);+ c3 I. L1 P* v3 E$ k
- ctx.setDebugInfo("sm", kk);
$ M Q% l' ]1 A% _8 s3 T6 E' o - rt = Date.now() - ti; y8 O* I. Q9 {. `/ K
- Thread.sleep(ck(rt - 1000 / fps));
4 ]! S& F' |1 P; v& A - ctx.setDebugInfo("error", 0)
! t+ v d1 b+ G1 w( K - } catch (e) {! W, n2 N! f6 B/ d" j$ Y0 @3 w/ U
- ctx.setDebugInfo("error", e);
* a$ x: ^# B- z3 ? }; \+ L! {6 `! q - }
, [2 f% A, \8 V! Q; k - }, H! m0 j. I- h, H1 k1 }
- print("Thread end:" + id);
3 H% n' h+ j! k- c" I - }' i. w. i' P0 {: ?3 J
- let th = new Thread(run, "qiehuan");
& X* a4 Y3 f G' y8 q; d1 ?0 n# W - th.start();- a( f4 A4 ?( t9 {6 l, _
- }
+ l& T% J$ ? j3 } - - ~& W! ^, l- ?- P3 K, N. J0 v
- function render(ctx, state, entity) {
* o7 d4 d3 q$ e+ A7 C - state.f.tick();
9 s& } W; e# y2 |" G( N o - }0 B. u# W' q1 k0 o- {0 x
- 6 ~2 |. _- ?7 R0 S
- function dispose(ctx, state, entity) {4 Y5 w; _* a: T8 x
- print("Dispose");( k9 F: E" u5 V r
- state.running = false;
2 w, U' X. Y- |; t& D. _% u7 L D - state.f.close();# z7 F; J* ?& Q: ~' B- \: N4 A
- }, C. S. x$ C9 P \+ m0 D" j3 y7 b
- : F; h* }5 H& O! I0 E3 _
- function setComp(g, value) {
' h7 m8 W, A' t) |6 _" D - g.setComposite(AlphaComposite.SrcOver.derive(value));& G4 _8 V8 Q5 i; f2 L
- }
复制代码 " @/ P) N& G8 g( D( ]- Y
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。
2 [' A+ Q/ L7 q" G' g# x; P! W6 I& _$ T. p4 |9 z1 N5 r
/ ^, V, p) z j顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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