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" _8 D1 `# E: q8 L4 W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 @+ b- ]: m3 S7 N( w- G4 \+ T4 H
- importPackage (java.lang);
3 H; t* V, w9 z8 f. r - importPackage (java.awt);2 l; u7 Q6 Y8 F
- & Y, L8 U% B3 ]; U) y! h. K
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 m: H) s& i( \* D* `8 A" d
1 J, h6 y# M: r# W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 D' Z- l) @. p* _6 @: q' N
- # e7 \8 ^3 e* S0 S- E# U
- function getW(str, font) {/ }0 l" H% c$ H& a8 T; |6 A
- let frc = Resources.getFontRenderContext();
0 p4 A2 e/ k$ A0 p - bounds = font.getStringBounds(str, frc);
* e2 m1 p3 p% S/ a3 [ - return Math.ceil(bounds.getWidth());. L) T7 Q. z& d1 \* e7 E8 ~ I
- }
. L- b l4 y2 ^0 g, f
# i3 }# |4 o1 \4 a% X- [# W- da = (g) => {//底图绘制
1 H0 t1 ^/ F' c, o6 m' T5 Q) U - g.setColor(Color.BLACK);
& w @' Q9 a0 J" W* n' E - g.fillRect(0, 0, 400, 400);
1 g2 {+ V& U0 }, a. `7 ~' i" b - }
% E. ]% v* {! q3 }! h - . g/ Y" T$ Q- \1 A/ j @
- db = (g) => {//上层绘制0 G5 m/ v* D: \
- g.setColor(Color.WHITE);
, k/ e& e1 k; ]7 h+ t5 \8 `5 ~ - g.fillRect(0, 0, 400, 400);
7 z, T# J/ b4 \* e9 K+ M1 A - g.setColor(Color.RED);
( o; x+ V& Y, V* b# j7 E - g.setFont(font0);7 v, [1 x$ c/ [2 ?+ \" N
- let str = "晴纱是男娘";
& @# l, D% Q/ \! e( Z. F - let ww = 400;5 K4 K; e* x& `) U! X$ ]
- let w = getW(str, font0);' ?- P; c- `' M8 X& L; O" C
- g.drawString(str, ww / 2 - w / 2, 200);- M5 _' C& I' _2 K/ d
- }
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- const mat = new Matrices();7 P0 ]* a7 {0 F
- mat.translate(0, 0.5, 0);
m, N, R( ]1 B T7 V# H - 5 l2 E, z( R% V$ F4 ~4 z0 X) z
- function create(ctx, state, entity) {+ R# H+ d; L$ p: }: w4 c% ~
- let info = {
8 k' C4 D+ U G - ctx: ctx,
; ~: b! c- Y% a8 L6 D7 {+ m - isTrain: false,) y& _) M+ c! w; H7 ^% \
- matrices: [mat],
9 j( V/ S2 x. v6 W# @9 { - texture: [400, 400],
; k; K! q( u( K7 _8 } - model: {
" F* y0 H* S$ l6 M% h - renderType: "light",
- o* X( @2 I% \5 x1 c* t( m - size: [1, 1]," E6 ?3 W% w N- @& @: }' _0 p
- uvSize: [1, 1]4 m' g- r" l9 J W
- }
7 t' `4 B! j2 W - }
2 T6 q. O, V' s/ ^; ~ - let f = new Face(info);
0 i6 Q6 b4 v V/ K( y: V - state.f = f;0 _/ o6 m& _# W
- + a" Z6 I; z, i @& ^% @
- let t = f.texture;
/ ?3 y2 m0 A' e- Y. |6 G+ e: B. Y - let g = t.graphics;
p, h" Z2 P, w$ e" u - state.running = true;
& F3 Q. |1 I3 G9 d - let fps = 24;: ?$ x- k- Q. u1 B h6 b
- da(g);//绘制底图
: H& u' p( a: D3 m6 y4 n - t.upload();
. p( P6 n2 ^0 b2 B* Y - let k = 0;
; Q, \- U7 P) E/ n; f" C# s3 x - let ti = Date.now();
+ b, L& H' j* E4 N - let rt = 0;
' s# l9 x6 H! ^ - smooth = (k, v) => {// 平滑变化
1 c8 @' z6 \: E! G4 t" j( ] - if (v > k) return k;
& v7 S7 g$ v% Q9 T; O - if (k < 0) return 0;9 k" v- B- y, s! l: ^
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 `4 P M' E6 K2 m- o - }% W! _+ A! H0 C5 Z6 c
- run = () => {// 新线程
5 o. q2 S H1 \! \2 | - let id = Thread.currentThread().getId();. o3 g" s1 J* y; O2 B4 C
- print("Thread start:" + id);
* v: D9 M3 ^" h% r! U - while (state.running) {
3 J# d' P- Y; Q5 N - try {( W" z1 }4 [+ g8 e+ w
- k += (Date.now() - ti) / 1000 * 0.2;
4 r* x9 ?0 w1 m - ti = Date.now();6 ^3 R$ ?; D3 l2 g0 R% m
- if (k > 1.5) {
. `" U( Z1 Y% J: q5 v3 J9 C - k = 0;2 x, B& a, r; }1 S$ M; |5 b9 j
- }
7 \- h* o/ H* @ - setComp(g, 1);" [# I4 X8 A5 m$ F, u- E P
- da(g);1 a9 u; z, V% ]0 ^
- let kk = smooth(1, k);//平滑切换透明度) g5 z5 m/ `) o
- setComp(g, kk);
- y) R/ C8 o# M% |4 x" ?7 p - db(g);' B/ @# I O/ _) ?/ M! Z
- t.upload();( S1 n* f+ s9 @8 N0 R
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) T+ ~! m3 e4 r - ctx.setDebugInfo("k", k);' Q) a# g4 M9 q4 I5 _* k6 a% e
- ctx.setDebugInfo("sm", kk);! @( ]; ?% `$ e* ^
- rt = Date.now() - ti;
3 B- v( {, J& ]# ^5 H y - Thread.sleep(ck(rt - 1000 / fps));2 k( V7 ]5 o& J5 Q9 {. u) S
- ctx.setDebugInfo("error", 0)$ r# U t+ {; m- z8 o% q# w
- } catch (e) {
7 Y- I3 s. S/ w+ m) } - ctx.setDebugInfo("error", e);- N$ f E7 z+ i% L( q& l a
- }% N% }6 r) I9 _; e0 ?
- }
% B; V. j2 ^ Q7 z* \6 n9 \0 ?6 D - print("Thread end:" + id);1 H5 ?0 z4 R" d' L6 _7 F/ B
- }
" `+ H* f. R3 T8 i; p; } - let th = new Thread(run, "qiehuan");( n6 Q$ q. V2 |; u8 c! r' e
- th.start();
# {% p X/ t/ l3 I - }
: P9 i: y7 A! ~* O+ c8 G' }, c - ' @! y: Q+ O+ L( t/ o, h( e
- function render(ctx, state, entity) {
' }& R' B6 L9 a6 J, U$ a - state.f.tick();
" D" S2 x7 t/ I' Q# U; G0 w. x - }
( `! L" {, h$ ?7 ?$ U9 N - ' O! z6 C# g. e) Q
- function dispose(ctx, state, entity) {& v' z) {7 V2 d4 b6 H
- print("Dispose");: F( U8 O* F# s6 ]
- state.running = false;3 Y5 H9 H+ z$ l" Y
- state.f.close();! S& V; I+ A I# u5 A
- }! b }" L+ [, P: M4 ^; o `0 @
- ' i1 n+ t2 b1 e% t) N
- function setComp(g, value) {3 [# _/ Q' V$ `3 U4 P
- g.setComposite(AlphaComposite.SrcOver.derive(value));% t; a a y5 K' b4 B: W: ^
- }
复制代码
+ `1 ]6 k- h$ u6 n! A5 i: Z/ D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。
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( [4 F" V! H" Z4 }3 o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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