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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。
0 Z4 w1 j/ [$ z5 ^- importPackage (java.lang);- t+ |- @" m* I
- importPackage (java.awt);2 O m! j' ]4 m* t
?0 C* d ~# H- H$ a) @) s- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) Q! L8 l/ X$ W$ ?+ C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 @# ~3 ~) ^5 m5 [- function getW(str, font) {
2 N4 T3 Q! D r& e" v - let frc = Resources.getFontRenderContext();
8 p6 b2 t/ ~3 @- B - bounds = font.getStringBounds(str, frc);
$ Q1 o4 B0 w3 s5 `( ~0 f - return Math.ceil(bounds.getWidth());
' {( @' S: Z ], P1 v* o: o - }
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& u+ @1 l0 P% O; z) N7 S% A6 T- da = (g) => {//底图绘制
( |. t! }) o2 Y6 |3 { - g.setColor(Color.BLACK);
2 _" s* Q6 i" }6 a% C9 q: F - g.fillRect(0, 0, 400, 400);% H3 \7 L/ P% h# ]% i6 G7 X! z {
- } Y! r& p1 ]- ?! f0 I3 ~: y
- ! D, [7 e0 y2 f( v% M
- db = (g) => {//上层绘制
3 n2 i. p3 I/ n k% C - g.setColor(Color.WHITE);
5 T* K1 Q" e2 W. W2 k - g.fillRect(0, 0, 400, 400);
$ |" y2 i l+ A- r3 m" e' f - g.setColor(Color.RED);
4 {. C$ ~2 s( v/ s - g.setFont(font0);
, y% s8 p! d5 U C9 M - let str = "晴纱是男娘";" U% G$ u% \0 b6 T( a' @0 U
- let ww = 400;
, J9 d0 R( R6 ?" [ - let w = getW(str, font0);1 }& {# ^/ [& e4 o8 j' S9 G0 X7 z
- g.drawString(str, ww / 2 - w / 2, 200);
n( A5 }7 z0 T' K - }
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8 @. C" z% E k) S1 s9 N1 y- const mat = new Matrices();
t, O. @' O& \ - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {% a# ^: O) K4 z7 Z! ~) G& m) }
- let info = {
. f" Z+ a4 f1 i$ V- B9 D5 u - ctx: ctx,' n4 c$ i4 w) F( j4 g0 f4 I3 j
- isTrain: false,1 n. L* F" t3 @+ O
- matrices: [mat], r( U$ u+ R$ V0 [" y3 U
- texture: [400, 400],
: S; _" A/ w9 } - model: {8 {5 C. B. N6 D; g
- renderType: "light",
" a; v7 y* v& q* N# J, S9 H - size: [1, 1],
: a5 x4 J) g$ t+ L - uvSize: [1, 1]0 Y) [) S5 u! [5 P! M0 T
- }
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- let f = new Face(info);+ }' V6 R e& w" }/ W8 W* V! c
- state.f = f;
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- let t = f.texture;, U& u1 V0 D: m/ _
- let g = t.graphics;) K* i z0 L/ p0 |7 A
- state.running = true;6 ^& j( | h! u0 o% R$ C2 s- P
- let fps = 24;0 N, Q# r8 ]0 @$ B9 A# B X
- da(g);//绘制底图
6 e+ a6 N% N2 C( l- a( v+ D - t.upload();- |7 \. h& V# W8 M; _) q( }( u
- let k = 0;- ~" a1 ^9 d$ n* i8 i/ D
- let ti = Date.now();, N. L5 l, `3 N6 F8 ]
- let rt = 0;) B3 ^* K5 p# |( Q: C
- smooth = (k, v) => {// 平滑变化
. J7 Y! i' R: a+ z# t - if (v > k) return k;
0 c7 H- X5 s( V! q; v - if (k < 0) return 0;! M+ N- \: ]; |4 {% H* D2 {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* | S. _7 i- o# ~+ Y - }/ n2 J0 E) E# r; k
- run = () => {// 新线程
/ d* G, \ {5 R6 ?% p8 a( Q - let id = Thread.currentThread().getId();$ n4 z7 r; h( w7 @3 I/ O2 R# k
- print("Thread start:" + id);
/ b- s5 r7 M0 U - while (state.running) {$ I: p+ p! X: K2 Z' L o! ^
- try {
/ |, z* `1 @4 Y: H/ o- y4 @, O3 W - k += (Date.now() - ti) / 1000 * 0.2;
% _( d' e8 H W3 S0 |* V# O - ti = Date.now();/ ?3 l. S5 }4 w8 E) t! x" f
- if (k > 1.5) {$ k8 Y9 x1 }8 }( W6 W6 R# ], `
- k = 0;
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- setComp(g, 1);
' L3 D: O4 F6 j: J - da(g);
, f! c0 T0 p! m" T - let kk = smooth(1, k);//平滑切换透明度0 y: K1 E0 f9 Y) d) v0 K6 ]' h/ Q
- setComp(g, kk);
4 V. c% f8 t2 l2 W- ]2 M - db(g);
6 l& E7 c! y- {: Y - t.upload();
$ e5 ~2 h" i8 r: d0 ], X! b* t5 R - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 P% |" y& ^; g1 w - ctx.setDebugInfo("k", k);
, M+ k" H1 L, z$ n& H6 P5 R1 d$ S - ctx.setDebugInfo("sm", kk);7 Q4 [" a% b: U- e* t7 m
- rt = Date.now() - ti;1 {! `5 m6 J5 f4 n0 ?
- Thread.sleep(ck(rt - 1000 / fps));
" [0 Y* j/ x# O$ a - ctx.setDebugInfo("error", 0)/ G9 M& ]! b _' O/ S
- } catch (e) {
7 |6 c$ k0 {0 ?' Y! g' g - ctx.setDebugInfo("error", e);! W' {+ b3 x+ e
- }
, Q6 w. J2 i1 T: r! ^ - }
# z, Y( r7 T" q7 v* N - print("Thread end:" + id);
5 J5 |0 `- |. s. z. b% j' S/ P - }
2 {; [& Q! B; e+ ^1 c N# K& `( ] - let th = new Thread(run, "qiehuan");
. _- D( A+ A0 E* l0 n - th.start();
0 u2 J- y0 V9 \ - }
. Q6 k+ d, t% B& Z
4 @ b$ s6 O2 ^- function render(ctx, state, entity) {1 C, u( G6 |- N! }8 ?
- state.f.tick();# Q5 l4 W3 X& t; C
- }9 ~3 C, o; Q9 d) T
- - @/ E, ?2 [5 t7 b0 j
- function dispose(ctx, state, entity) {
2 t) X2 P( P' V: y - print("Dispose");
4 Z* n) e" U- S3 @, l - state.running = false;
$ p( |) n2 ?# I$ D9 S/ r* g2 D2 q - state.f.close(); i0 u& H) U! p v2 J* q
- }5 j) X$ N! s/ b2 ^/ t* c9 l
* r* q' h6 Y4 F2 B! }- function setComp(g, value) {
; x1 W: ?3 ~7 ^0 Z: _ - g.setComposite(AlphaComposite.SrcOver.derive(value));
# Q, h# x9 [- K \. p - }
复制代码
" |9 V% y0 x2 A- S9 ~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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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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