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' G5 S6 G, m0 I& g; |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。7 F0 {9 d# P7 D( Q
- importPackage (java.lang);
: }. z- g' K, y7 D. g' u - importPackage (java.awt);& m! H, \2 D6 H* l q7 p3 i4 ]- L
' G( m) d8 g i0 \0 m- n* s/ o- include(Resources.id("mtrsteamloco:library/code/face.js"));! o9 M3 M4 [! `; E5 B
. ~% D4 S9 k- i+ `4 n( g# B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) V7 k. m1 i9 U# R- function getW(str, font) {9 Y6 p7 Q- `, ^3 U! |! M6 |/ t' V
- let frc = Resources.getFontRenderContext();+ Y" Z& D/ z0 r; h* r2 q0 B7 ~" t1 f
- bounds = font.getStringBounds(str, frc);( W# W; a# J) C3 w9 X
- return Math.ceil(bounds.getWidth());
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- / m/ w) ~4 t' Z+ [, |4 n/ D
- da = (g) => {//底图绘制
% Q3 `7 f8 I5 v: R - g.setColor(Color.BLACK);3 ]/ H9 x: ~( ?' w# B% k$ }
- g.fillRect(0, 0, 400, 400);0 P) U Y' l4 E p( R2 o! ]
- }
" n& u; n1 }, `" e - " a U: ~* S, R8 [$ L! ^" }
- db = (g) => {//上层绘制
& K+ {6 e0 w0 E3 w - g.setColor(Color.WHITE);
( U- B: ?* e, s Q3 s9 k - g.fillRect(0, 0, 400, 400);$ y, z/ l! w' _* p: ?! X/ S
- g.setColor(Color.RED);6 l7 N( u& E4 ~' v+ \7 d
- g.setFont(font0);
& r& i' }2 F6 a k1 S: F1 O - let str = "晴纱是男娘";: E8 |+ O! I+ \
- let ww = 400;
' O/ Y: I& g8 _5 B - let w = getW(str, font0);+ e' N) X$ W1 X8 R/ z6 g0 {5 s# ^) P
- g.drawString(str, ww / 2 - w / 2, 200);6 ~7 o& Y: K2 m Q0 o5 `, v( O
- }
# L& @5 e" D& ?3 F/ e- ?
" y' k. e1 K I3 t# M- const mat = new Matrices();1 J( X; Z- U+ r0 I, J" I2 o/ u
- mat.translate(0, 0.5, 0);- n M5 |& ^$ C! S& o& \
- 2 }/ x& s5 L4 W5 W0 q6 N/ T6 Y
- function create(ctx, state, entity) {( {; A( {8 M. l z, I
- let info = {
# q6 I! i9 M$ D5 A - ctx: ctx,# h, F% ~) n, ?. d
- isTrain: false,
' w! U; q; J# G' I8 c - matrices: [mat],$ V2 C3 H6 J4 \- ]
- texture: [400, 400],
3 _: r) o; v8 x- u& Z - model: {. n% N# r% _9 P
- renderType: "light",
) V/ ~4 O# ?5 j2 k. o: q - size: [1, 1],
: w- s0 z3 I2 }1 D% C - uvSize: [1, 1]! Q7 v7 f2 n$ Y
- }
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- let f = new Face(info);
& z( r9 V" `" U; B - state.f = f;
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- let t = f.texture;7 k' Y: \2 r9 p3 n4 n" _# q' n: G9 p
- let g = t.graphics;/ _, J# J6 ~4 ]
- state.running = true;
" q- {& j$ a9 E1 I, d! E& f1 H! c - let fps = 24;
+ ^/ m: V! |( N3 |! y8 Y - da(g);//绘制底图
; w4 G w8 k( ? - t.upload();8 o* ?2 U# w1 R" I6 O2 m
- let k = 0;
4 H5 h8 g, q z7 u( r* U& z - let ti = Date.now();
! W) ]& t! `+ |' @' y' s0 v% T - let rt = 0;- r* i8 m) }# I$ ?
- smooth = (k, v) => {// 平滑变化' l$ X# a7 q5 T, y0 q
- if (v > k) return k; c/ {0 W! K) ?) @4 f. H5 e
- if (k < 0) return 0;
( ~8 l2 Z1 d' Q1 t4 } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ k9 f; t$ A6 J3 g- { - }
8 Z8 v* y+ A$ X4 L* n7 f) T - run = () => {// 新线程
; h' w+ s5 w3 Z' O8 I) ] - let id = Thread.currentThread().getId();* l+ Q2 a- X) M
- print("Thread start:" + id);
; Z! V, Q& [6 ~+ o F - while (state.running) {
4 c% m1 i y4 \( R - try {
' \5 }4 p* b4 T" y, \ - k += (Date.now() - ti) / 1000 * 0.2;
0 Q) p: W( B' w7 ^9 d9 o* `$ Q - ti = Date.now();
/ m9 ^, n, ~1 M - if (k > 1.5) {! _$ K2 J. c( @1 e$ C
- k = 0;/ D4 N5 `3 l6 ?# b, K3 U% x, S, k, F! T
- }
& [" p: r6 v. S - setComp(g, 1);1 w3 u0 y1 c0 b2 U, I- x8 I
- da(g);- Y( o# j+ m( C6 B* C2 ?
- let kk = smooth(1, k);//平滑切换透明度
m* M \* m8 k6 Y, t - setComp(g, kk);# f7 Q- z% s5 p. A2 H
- db(g);
4 P! R) V7 `8 i- P8 a P4 }' a - t.upload();8 K, z3 z/ ?& V2 j/ V3 m
- ctx.setDebugInfo("rt" ,Date.now() - ti);
, q0 R3 d8 [0 I, v! T$ ^ - ctx.setDebugInfo("k", k);
: L; B4 u5 t1 A- Z; M% P: ]# g - ctx.setDebugInfo("sm", kk);+ w. \4 m4 `% V+ C% `: {
- rt = Date.now() - ti;" @4 [" S/ J, d h( y5 ~
- Thread.sleep(ck(rt - 1000 / fps));
9 {# I( V7 ?8 e( G$ _+ C1 U7 \" x - ctx.setDebugInfo("error", 0)' H+ X( k0 U$ H O* o+ I5 v7 f8 B! i
- } catch (e) {1 `& j+ B' y% y7 o' E2 V- [% H! C
- ctx.setDebugInfo("error", e);
# b, B$ L9 s+ v$ Q0 y - }
" E3 r1 _( f3 [( } - }8 l2 X# W: C7 q
- print("Thread end:" + id);6 c! s: P9 N; }
- }; V0 K& K4 `% d( c& w! T6 ]& u
- let th = new Thread(run, "qiehuan");4 ?+ b& ]" W2 Z; O
- th.start();
9 f$ J5 n. r( {% L1 a, j) q - }
5 x( e% @/ Q. N+ N& u- z- Z
3 A. G% z9 C' I- g f- function render(ctx, state, entity) {
9 M8 m7 S+ C: H5 c - state.f.tick();
9 y0 k& A( w5 \ - }
% q$ J, @, v$ b7 b5 J, }8 A5 T0 k
7 J6 l. \2 n7 a- function dispose(ctx, state, entity) {2 U; M0 o2 [' U; ]3 I- r
- print("Dispose");# {' U0 h% v$ T1 {* e
- state.running = false;
" ^* ?3 k. {- y3 u* b - state.f.close();
6 A" z/ d8 x+ [" s% p2 D' x - }9 B! d5 ?& p7 i0 h( l
- c) D" L" @, p* j( I- function setComp(g, value) {1 g) b; Q7 A. r7 M2 U9 \
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 d/ { q6 _# b: G; x7 b' u
- }
复制代码
# p3 ]- b( S+ Q, |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。5 ~7 m5 F" L* t/ r' m8 r
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), r5 Y# p) }* D) I* a
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