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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。
9 k9 c1 |" _) @$ Q6 i5 U- importPackage (java.lang);( q# N* n. \# m- L6 T) g+ h
- importPackage (java.awt);( w0 A/ K' }( N* X/ {: i- e. S
- $ P7 R1 d9 i0 C! |
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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& k- f5 i6 B! {- @8 n/ z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ G# t( i. O+ a; W; L$ l
6 y+ \# y! J2 t4 @+ l- function getW(str, font) {; ?3 E. j6 u: g' y7 V
- let frc = Resources.getFontRenderContext();9 F1 h. z9 ?0 J1 J* |" b0 A
- bounds = font.getStringBounds(str, frc);
5 J& a6 T5 |& \2 E/ `+ U - return Math.ceil(bounds.getWidth());
/ T8 _: A# F& y9 q4 x* Y; S( C - }
. G7 M/ e( x5 @, y9 w
) e) p) {4 m: j$ N- da = (g) => {//底图绘制
2 U. e, p. E! e, f' V2 U - g.setColor(Color.BLACK);1 J. v1 s9 q" q. n3 t: N5 Z
- g.fillRect(0, 0, 400, 400);
2 `1 W' l/ t7 q- E* ]8 r3 Q& w0 T - }
" L) \' ^2 b7 Z8 Q9 G0 Q) w
% d- `( Q9 z. V% @- \$ [2 P- db = (g) => {//上层绘制
$ h% u# C8 D7 P! T2 L9 P! \7 N - g.setColor(Color.WHITE);
' P8 M. ?" D, ~7 K# \; k - g.fillRect(0, 0, 400, 400);1 H; U" t/ F4 C( }9 p
- g.setColor(Color.RED);. Q! ^$ L" I- {2 i T4 [
- g.setFont(font0);9 f8 B; S' {& C6 {/ _ B0 J
- let str = "晴纱是男娘";
( p% f" ]' w# Q! p# s5 K3 N - let ww = 400;7 I# Z( R7 S- a* p' L* k1 M- N
- let w = getW(str, font0);1 s/ S! L1 W; E
- g.drawString(str, ww / 2 - w / 2, 200);
, \0 |. n% k& i. ~ - }
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- const mat = new Matrices();" O* M$ @- ^+ ]9 c
- mat.translate(0, 0.5, 0);) @/ J8 z& l2 P6 E8 f5 J9 g
- $ l& M' X+ b; d2 }( A/ `) e. Z/ ^
- function create(ctx, state, entity) {1 o5 n; ]3 C* H1 N
- let info = {
% n( ^+ e) w1 O- i) Z- n - ctx: ctx,
" f) C3 a" @8 {/ ]# ]4 H - isTrain: false,2 N4 Z4 o! s- @0 h5 |" H
- matrices: [mat],
4 I( K2 t: W# l L2 e, c - texture: [400, 400],
0 m7 z6 O: {* o% W7 y2 M - model: {
4 I+ Q% j0 B v% ^* i - renderType: "light",6 i) D% {: E0 A8 v. A
- size: [1, 1],
0 ^; F4 m7 L6 _' S6 m3 h - uvSize: [1, 1]
$ Q% y' P4 V5 T/ G! N) f - }
" B" L4 H! i H5 y4 o. @ - }
- M) i9 A8 M$ s6 ?, u: i! Y - let f = new Face(info);
% f0 e9 J# d' o6 q! W5 c3 f - state.f = f; s5 e6 Z e; d* r
7 x6 s& R% Q l% ^+ ?$ D- let t = f.texture;0 \% n! W/ J$ `: a" t: C
- let g = t.graphics;5 O. X7 k6 p8 g( O8 c
- state.running = true;6 L; m; r; i' ?' E* h0 V+ R8 Z* f2 c
- let fps = 24;$ R. z5 Q% B8 ] o6 O! ?5 O
- da(g);//绘制底图/ Z5 v9 I5 M# p( P( o# y
- t.upload();
" P& I: X4 B5 M9 O3 Q - let k = 0;
+ r: }* W# k ~! M - let ti = Date.now();
3 K C1 e; c' \2 F2 E - let rt = 0;
1 x' D ]! r& X) U - smooth = (k, v) => {// 平滑变化9 \5 a# [! g4 X, }6 Z1 h& ^
- if (v > k) return k;
& M( M* ?# x! \. J( y0 ], ^ - if (k < 0) return 0;
. H0 w1 C' A$ S7 m, b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% D% Q% U9 B1 z9 N. A: y" y
- }
2 Z4 K' N( ~6 h" m( P - run = () => {// 新线程2 U: W( }4 c: @: V6 B
- let id = Thread.currentThread().getId();
) R9 e0 p; M5 j1 o+ J: m - print("Thread start:" + id);$ ~$ k `. Z9 T F: c: \
- while (state.running) {
" W- C% T% w1 s - try {
) q7 p+ s- o. A" X5 t; g; D H D - k += (Date.now() - ti) / 1000 * 0.2;. L1 ^5 p* S5 `- O
- ti = Date.now();1 m# E" f0 D: s3 v& o: _
- if (k > 1.5) {
0 |2 N$ a5 ?/ c' k; j( H - k = 0;' E. K& q; ~7 o% S- ~; C- ^
- }5 D, ~0 Y+ U/ j% R9 J) c/ f
- setComp(g, 1);1 A6 L& f- m' m U# }% l2 g6 a+ u9 u
- da(g);8 t! k- u; K" `" e$ M, N5 S$ \
- let kk = smooth(1, k);//平滑切换透明度
+ W- A4 O5 G% V1 s; K( n - setComp(g, kk);
5 H% f8 w" L0 B0 C8 S+ e* K - db(g);$ h& K! K" W. H7 Y$ _& T
- t.upload();
2 ^0 T% |3 `* O& S1 d: Z - ctx.setDebugInfo("rt" ,Date.now() - ti);
& J3 n+ n5 X o" U9 y8 ^5 G5 a5 O - ctx.setDebugInfo("k", k);* ]8 t2 P" U) |/ P
- ctx.setDebugInfo("sm", kk);( Q# R( O G: o: i
- rt = Date.now() - ti;' C4 S0 Z; k! N( m0 ^# J
- Thread.sleep(ck(rt - 1000 / fps));0 F+ B: i8 n) D/ D
- ctx.setDebugInfo("error", 0); W+ s. t, A% }! i; ^
- } catch (e) {
" M2 z. w* J3 G) d2 a( m - ctx.setDebugInfo("error", e);; U* U: }2 I% r! j2 R
- }9 M1 | i( g" f+ j; G& U0 w
- }
7 o) S7 S* A6 `2 n4 z3 O0 y: |! t - print("Thread end:" + id);
f0 L1 e) m+ F0 i: o; _8 V - }$ k& Q; A# X+ M: O1 o1 [: {. Z- Z) F
- let th = new Thread(run, "qiehuan");
2 d$ k$ e* n# ^2 Y, G U - th.start();7 C, |6 z/ ~( s$ z- t1 S
- }) f5 p5 F5 z& Z* E8 s- |
- : C7 W* J' v0 _) C+ @
- function render(ctx, state, entity) {. b- F$ f0 f4 i% t# v! {. g- M3 Z
- state.f.tick();. B6 e' ^4 ]3 i X
- }
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- function dispose(ctx, state, entity) {% @7 }4 P. S# N" @
- print("Dispose");
% s9 ^6 r3 ], S& t" g I - state.running = false;
- g: j# W6 A6 |1 R - state.f.close();! S+ ~- |( w3 Z& }, X5 ~- g
- }" a, H9 Y ^$ G! Y9 r! C' V
- $ H' k: ]% S0 K) p: T
- function setComp(g, value) {
& A) z5 N% U3 V9 H9 O0 C - g.setComposite(AlphaComposite.SrcOver.derive(value));3 v% j5 y5 A3 {" I- M
- }
复制代码
' }* I4 I. |! v5 t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。- M( L/ u, n! Y/ _: l
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$ `4 v7 a6 i0 z! C& \* k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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