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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。
) h. f, G( a" X3 i5 [ D- importPackage (java.lang);
- p. \8 M5 \5 E - importPackage (java.awt);; A# c4 ~- b+ l' t0 _
" L) d& j; o3 s- include(Resources.id("mtrsteamloco:library/code/face.js"));' ^. R& [3 F& j# y- i
- + v2 Z: H# g3 [% X. ~$ x) h& _8 R
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 O4 k0 X+ R7 v6 m$ m
. J/ v7 j. b* K# p; L- function getW(str, font) {- e% ~- Z3 `4 T4 B: e, G5 k7 U
- let frc = Resources.getFontRenderContext();
6 @3 U1 e$ o' k* e/ u" D - bounds = font.getStringBounds(str, frc);
1 U1 z( b# s/ w/ J# o+ | - return Math.ceil(bounds.getWidth());5 Q9 \% O- g7 ?5 t X; |) M
- }
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- da = (g) => {//底图绘制
9 Q0 Z( p( H5 r4 N# M2 f+ G- d - g.setColor(Color.BLACK);
4 x2 O8 B+ p4 T- z - g.fillRect(0, 0, 400, 400);7 Z# ]9 y4 G8 m9 R; Y$ P3 F$ K/ n
- } x( x# D( ~# H
& _( v$ e0 e4 C: j1 \8 F- db = (g) => {//上层绘制
* k1 c" p/ p8 b4 x - g.setColor(Color.WHITE);2 s- p& C+ a- X9 y) V0 k# \
- g.fillRect(0, 0, 400, 400);
5 e6 z; X. h6 t - g.setColor(Color.RED);* T4 K" ?( l( K6 x' n4 Z
- g.setFont(font0);6 `7 m& J2 C4 F2 z3 @
- let str = "晴纱是男娘";
( `# O5 e: G+ @# H6 |) l# q - let ww = 400;
; E* P' B2 F# |/ f - let w = getW(str, font0);. t' |4 Q9 y2 |( C# n. O. H7 F
- g.drawString(str, ww / 2 - w / 2, 200);: |( @5 o+ M2 u4 G* o- S9 p
- }
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) n! R4 Z5 z. ~; ^% {% I- {) k- const mat = new Matrices();9 `8 Y9 J1 T( I6 {( `
- mat.translate(0, 0.5, 0);
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3 n1 [6 z& e" V- function create(ctx, state, entity) {. u3 F: S+ n2 x9 k
- let info = {6 G4 ?3 b5 D( V8 E: l
- ctx: ctx,
' K$ X/ T" u7 x4 k% i3 S) o - isTrain: false,
* R5 K$ g& w3 t& H$ p( [' ~ - matrices: [mat],( f; u' A( q: i8 Y$ T
- texture: [400, 400],% {) `0 N4 s. w2 k7 Q
- model: {
3 C! T( g) e- r& X6 r/ i - renderType: "light",
4 w6 |. r0 w+ k - size: [1, 1],2 a7 R0 N; q' c7 G8 C
- uvSize: [1, 1]* c/ u% y( g, J
- }
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- let f = new Face(info);. x% v* h4 Z+ k( y* Y# F& {/ ~
- state.f = f;
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- let t = f.texture;4 N( |, `4 h2 r, k
- let g = t.graphics;" h( B0 _# r: C0 W. j. a( \
- state.running = true;
) ^, D0 {! c9 v% i2 J" W - let fps = 24;9 _4 W0 C5 q1 _4 n4 }1 z$ h0 o
- da(g);//绘制底图4 g; R) z- Q8 l7 C- [
- t.upload();# w" C/ L# v& y: l, Q
- let k = 0;1 t- a2 P, s3 k! Y' x k0 I
- let ti = Date.now();. f: X. z1 [/ r7 L4 O
- let rt = 0;
, ^3 O& N/ o! q. C - smooth = (k, v) => {// 平滑变化
, N) Z1 t$ X p - if (v > k) return k;' m+ W% O! s+ Q
- if (k < 0) return 0; a) R/ K# j+ V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 ` [1 v; a8 V/ x* C- _, q% ?' @7 r) x
- }% Q5 O' G3 e6 F y0 r" ]/ J% `7 _& @
- run = () => {// 新线程
% L2 F" m+ }4 j. Z- c; X - let id = Thread.currentThread().getId();
( T0 `; u5 c* \$ j$ }0 v: n% ? - print("Thread start:" + id);& Y* ?# C; t# T2 [6 n
- while (state.running) {
+ Y6 A# W0 g% z( W - try {) Q D( x& F$ |8 v# I& U
- k += (Date.now() - ti) / 1000 * 0.2;
9 Q# m: G9 z( U' L - ti = Date.now();
6 C7 K4 l: y( V% ]4 U$ m% ] - if (k > 1.5) {
. x8 ~! E+ `4 L, b G - k = 0;9 t6 s1 M4 O! y
- }
5 z: }; z8 R9 H* i - setComp(g, 1);( H2 S! `: q& |0 {5 Z* n! f# F
- da(g);; f: U6 f, R9 ^4 B
- let kk = smooth(1, k);//平滑切换透明度
7 p3 v; @. x# C R) o$ v - setComp(g, kk);* O& E0 s6 e2 @6 j4 ~0 t5 l
- db(g);% E2 M5 d8 H# o1 D% q
- t.upload();
~' q9 H8 B# p' K8 t - ctx.setDebugInfo("rt" ,Date.now() - ti);! o0 V1 B; j* N6 C
- ctx.setDebugInfo("k", k);
; F4 o6 g7 a8 i) G4 v - ctx.setDebugInfo("sm", kk);
+ D' e" r! Y! M4 d: P - rt = Date.now() - ti;
/ m- \! g, r3 T" Y9 q - Thread.sleep(ck(rt - 1000 / fps));
2 ^: h+ Y) ]3 Z - ctx.setDebugInfo("error", 0)
6 c' k) F+ p7 _ - } catch (e) {
0 s" z# @- ~6 [8 H0 D - ctx.setDebugInfo("error", e);
7 r) n. e) p4 z) T# `/ r - }+ a0 w: o# [7 b. B0 _. f- i
- }
. Z% H9 S3 e1 G: R7 o% w/ Y& ~5 O - print("Thread end:" + id);
: |6 @- f, H1 _4 A - }3 a9 n5 v8 M S3 T# c8 v
- let th = new Thread(run, "qiehuan");/ X% [0 k4 l. K6 B- z( v
- th.start();: `- {, W1 O# z# S7 F+ T
- }( o' c1 r9 i- m4 j
- ) c% m, d5 t' |! L; J3 w Z
- function render(ctx, state, entity) {! y! F5 k4 L9 s. ]& n' s
- state.f.tick();
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- 2 B; D, e$ o$ w& A4 E7 J
- function dispose(ctx, state, entity) {. J/ _. V# J" \6 _7 \* n
- print("Dispose");% R4 [4 b0 J1 A5 A2 M/ x$ F2 ]
- state.running = false;
, v% \" r% z1 l1 B% b$ ? - state.f.close();5 I% y P7 ?% |4 v/ q" e
- }
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5 y1 a) X T! P- function setComp(g, value) {
8 K& u- g; z1 U; q6 ] - g.setComposite(AlphaComposite.SrcOver.derive(value));$ \3 o$ S9 S+ A" P# d
- }
复制代码
6 h o. t. U& _, k( v# c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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5 _4 ?% O0 a1 \- P顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). f: E8 H+ C' N8 u
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