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1 o4 P8 t! H2 X! P+ M" d. S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。2 F" L7 t/ H# K8 f2 l
- importPackage (java.lang);
- C: Z( ?% j% g5 p. u - importPackage (java.awt);
5 e9 V) C: A, i+ q
) a- p" @* k4 Z2 z8 ^- include(Resources.id("mtrsteamloco:library/code/face.js"));8 q" R- ?+ ?4 X0 C' U
- 7 d* H% h& x8 I7 e4 o1 G
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 R& _6 ?: y8 c% }2 H
- & E+ a( z8 w" W6 F3 t9 g) T
- function getW(str, font) {0 E# F2 i+ `* V0 N2 A" h
- let frc = Resources.getFontRenderContext();) U3 v8 k \; z5 N
- bounds = font.getStringBounds(str, frc);
% X5 k: \9 i& F6 E$ _3 N- x - return Math.ceil(bounds.getWidth());% H: v ~% L/ r1 ~# U0 x( c: h
- }
, x% v* B: Y, K& g3 | - ( P- l4 k( Z1 W' K* i
- da = (g) => {//底图绘制" @& \) O" ]+ S9 j2 I
- g.setColor(Color.BLACK);
& l G" u8 ]0 a+ @ - g.fillRect(0, 0, 400, 400);/ ~# v; A. ?) {. H6 Q
- }
. y: I# I) Y2 Y, e
/ k3 x8 y0 {- v2 @* z; T- db = (g) => {//上层绘制# c! o& e- @6 N
- g.setColor(Color.WHITE);$ f1 N& }) w' i( G
- g.fillRect(0, 0, 400, 400);
# W! n4 P2 W/ M4 P - g.setColor(Color.RED);$ O$ C6 G% [6 n6 H
- g.setFont(font0);2 k* j _6 P+ v! `3 r0 Q1 |4 c
- let str = "晴纱是男娘";8 h2 _0 C2 i9 O/ y" K
- let ww = 400;, x% `& r" ~# n& a
- let w = getW(str, font0);
; H! c$ t; T! D3 F% p7 }$ E2 w - g.drawString(str, ww / 2 - w / 2, 200);
' k+ @. x7 I" t g7 F - }( n7 A' ~( l* E' o- `
- ' b) v& H; C6 r8 c, {
- const mat = new Matrices();
# J. l$ f- Y' @" h8 U - mat.translate(0, 0.5, 0);
" r6 T3 v" \; o
5 D; a! m. l; D3 r2 {4 ^$ r2 S- function create(ctx, state, entity) {
: C- y7 J0 `/ r0 g5 j. X4 Q - let info = {
, o& ^( ?5 R, d" c" | - ctx: ctx,; m5 `& @1 P0 W" g3 F* l' O
- isTrain: false,) @) u1 u; G: i
- matrices: [mat],9 y# H8 O9 [/ H0 B2 k
- texture: [400, 400],
) ?" v! v: b: W" c( D/ W; J - model: {- B& L2 u4 m: K8 u; |. j0 U8 B
- renderType: "light"," R3 x- c4 L: B! Q, F4 ~: _( e
- size: [1, 1],
. w% q( [3 ~) M$ H - uvSize: [1, 1]
$ q. |% K2 w: `! E( ]7 J! f- w7 y! b - } g- I T9 [; S4 ]6 `5 H' l9 o
- }1 X& P- I, H3 H
- let f = new Face(info);
$ C; {% \: {8 i' Q$ ]" e, l# b - state.f = f;5 w) Y+ D' X) L1 i2 c& v) A/ ?7 ]
- 6 \* g( w9 C7 |4 ?
- let t = f.texture; H0 m1 q3 T! p# q
- let g = t.graphics;
* Z4 R& \9 {8 O/ O% o - state.running = true;
; B6 n" M4 M. n2 S1 Y0 R8 p+ H - let fps = 24;
8 a; r4 h$ c& v' z& R8 b5 e - da(g);//绘制底图
& p) l# o: g, c; n/ E& ^" O! w - t.upload();
4 F# A6 h* ~( q - let k = 0;6 c% W, F* }+ B J* {1 q5 n
- let ti = Date.now();* u9 f3 v6 S( H9 n
- let rt = 0;
: S: f. k# h- r& D; B- k3 `( Z - smooth = (k, v) => {// 平滑变化8 H1 u0 h9 D8 F7 W- f+ ?
- if (v > k) return k;9 Y$ y+ q$ r9 @+ `
- if (k < 0) return 0;
% D! ?7 ?& `) G5 r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" E$ S" o; z0 U' R. s! j( F, | - }
/ ~4 l! T% U# w6 D - run = () => {// 新线程
* y9 b. T4 F# u L6 H - let id = Thread.currentThread().getId();
' W; x! m6 O0 q - print("Thread start:" + id);5 P. I6 C- ~) {& L- l: o% |6 |
- while (state.running) {
9 z y/ u6 a+ c# B - try {
: R( o+ { b- f9 a - k += (Date.now() - ti) / 1000 * 0.2;% _8 X% w" r/ y0 K/ x5 [1 o1 x
- ti = Date.now();
! G; G, w( `8 d1 O2 `/ q" \ - if (k > 1.5) {
+ E, ]) J& Z2 Z - k = 0;. X) N. V- C2 y- ]& l
- }
# I* t% f# K2 H: b4 r - setComp(g, 1);' l; Z% [6 R& L2 E2 E7 ^8 p
- da(g);
$ k0 u" a' s9 a$ e - let kk = smooth(1, k);//平滑切换透明度: ]+ V3 O9 U3 Q. t
- setComp(g, kk);
% L: h2 E* L, b8 _) Q - db(g);
7 A! j5 r" R+ Z. m! r0 s+ T; e) G - t.upload();( K7 ~3 f9 O$ E+ u( O6 o$ j# }
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ z/ Z- J3 A1 d6 q - ctx.setDebugInfo("k", k);
& C8 v4 Y3 `, \6 ?) c7 r) j. L, N% M, j - ctx.setDebugInfo("sm", kk);
% L( {: Z4 f5 O% ?" Z& x5 p6 C8 P - rt = Date.now() - ti;
! Q3 j9 t+ q0 } - Thread.sleep(ck(rt - 1000 / fps));
! r$ O% D" J+ }: [8 g2 M7 W5 _" \ - ctx.setDebugInfo("error", 0)
2 s2 c4 p, L r' n: O/ ?( `3 w4 g - } catch (e) {
; s8 o& _3 l7 @! d: E+ D0 \3 C2 `' n - ctx.setDebugInfo("error", e);; |+ O( F% r7 k$ a& U+ _
- }
9 e% ?) R8 ^# Y5 |2 | - } n/ h1 t8 t1 R
- print("Thread end:" + id);
@3 i' P9 V. y. T - } Q) q' [+ M. N' u8 H7 X1 W. ^
- let th = new Thread(run, "qiehuan");$ M6 v2 \1 w* i& I) s$ M4 ]/ Z! r
- th.start();
" z/ s( G9 n6 [1 C - }) f0 m0 O6 |( X. }$ |
- 1 k( ]2 B! I1 ^
- function render(ctx, state, entity) {7 M- H; D* U' S( f E) l
- state.f.tick();
8 h% o7 ^+ }7 m1 R2 O* } - }
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0 m m/ G/ O) m# @- function dispose(ctx, state, entity) {3 P! I9 q# j R8 W; i
- print("Dispose");
+ W4 p* b2 I8 V% Z- p6 t - state.running = false;$ S+ G8 V$ I3 }, I# P7 i
- state.f.close();
- i2 b/ A9 t) Y. Z% w - }# z; o, ~6 c( g" P7 l
- * F% s& I6 T, w
- function setComp(g, value) { f Z* t6 [- x' |" ?& |
- g.setComposite(AlphaComposite.SrcOver.derive(value));
+ X5 J+ N" o* }) f - }
复制代码 3 J! z, B8 Q& A" t. T3 k# L: 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。 @5 N4 I8 V# E$ V: p8 [) ?
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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)6 p/ p! G, A- X( E
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