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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。
) b! J5 J& |4 l: k$ e5 A- importPackage (java.lang);" m9 f$ b* N6 z% i# M
- importPackage (java.awt);/ o! n5 y; D0 K7 f7 d
' Y0 i1 x3 F+ t/ K: H4 n6 l- include(Resources.id("mtrsteamloco:library/code/face.js"));
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/ R: h. |0 W0 \) |7 R. g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
0 v- m2 k) ~0 L4 I+ w - let frc = Resources.getFontRenderContext();
3 s2 z" L. U9 [4 Q6 T4 r - bounds = font.getStringBounds(str, frc);
: j. |4 ~- ]3 K ^ - return Math.ceil(bounds.getWidth());1 L0 R2 \. T1 ?+ L& W8 y2 S4 O
- }; h \* N9 N q7 n- {+ }/ R8 X
- + E0 K, e! @1 C
- da = (g) => {//底图绘制
/ L9 Y% A9 G8 u6 w9 D, A. A - g.setColor(Color.BLACK);/ L$ Z" ^8 E. | I- s
- g.fillRect(0, 0, 400, 400);
. a& s3 ?+ e% l7 r' h3 U7 I/ P* k - }) F3 n D1 p% `$ [4 \
' W# `! W7 t, ~9 H7 d& ~- db = (g) => {//上层绘制
+ A- H: [+ _9 D5 w7 T0 F - g.setColor(Color.WHITE);
b: l' @- `4 D2 F p - g.fillRect(0, 0, 400, 400);, x8 S6 m3 z& S0 ?7 O- `6 k6 C
- g.setColor(Color.RED);
3 M% v* w; w' [ - g.setFont(font0);; u* m( z8 w* \* k7 v, O+ \5 o$ a- h
- let str = "晴纱是男娘";
0 P0 \$ D Y- o5 z- @0 w$ T - let ww = 400;
: r' [% D$ M; k - let w = getW(str, font0);; p# C5 T3 x) ~9 m0 M
- g.drawString(str, ww / 2 - w / 2, 200);
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- 9 P, h7 R- V8 ^# Y
- const mat = new Matrices();$ S/ @$ X6 [5 W$ D+ b* M0 d
- mat.translate(0, 0.5, 0);
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) Q0 w, Q- x9 F L( B- function create(ctx, state, entity) {
$ x) @+ X3 z2 e3 Q" R$ F - let info = { r: {, a8 U# q3 n
- ctx: ctx,6 @6 ]+ H/ [5 Y8 o
- isTrain: false,& z: e, o9 y& C& G# n8 c
- matrices: [mat],: c: @7 m/ n) G! F, a2 N; f0 _
- texture: [400, 400],
2 p x9 [6 O4 V9 j$ e9 x - model: {- f9 D2 b( l1 g
- renderType: "light",0 G$ S: r8 t/ z# K I, H
- size: [1, 1],2 x$ ?& m) @' r2 m3 V: O1 _ D
- uvSize: [1, 1]
: P( `7 \# I+ `) h" K - }
$ k/ n8 d. _+ X1 e5 T: n2 I+ M: S - }
+ d! h9 E" v+ q W, N - let f = new Face(info);
6 W2 F+ e/ H' P9 a) \ - state.f = f;
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' C5 O1 o. I! {8 g- let t = f.texture;- U! J! v& R! k8 B! w
- let g = t.graphics; i8 n8 C1 y0 @' y% R$ F/ M) p
- state.running = true;
8 K8 \: y+ {2 t, b- v+ ^+ ~' S - let fps = 24;( U; V1 ?$ a' s8 k! L
- da(g);//绘制底图
: ?; B, w: ?# K+ @3 s - t.upload();
; b# w7 T/ {7 ^) [0 _ - let k = 0;; v2 i. H% ~2 e' a* @8 |9 i: o! m: [
- let ti = Date.now();5 r8 _! y4 \% m& ~5 Q% d% `8 B
- let rt = 0;! A& t% e7 k/ r
- smooth = (k, v) => {// 平滑变化
0 L* F# x" r3 F* j0 s: q& V - if (v > k) return k;3 m4 h M# \, s# ]0 Y' B$ p7 Y
- if (k < 0) return 0;/ u# n: Y# ^, a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程; d3 D8 T1 b* ~$ e4 {( s$ ?, ^
- let id = Thread.currentThread().getId();! z9 I& i& s n' b5 N
- print("Thread start:" + id);
( b* ?6 y% K0 v# \( z/ B - while (state.running) {
7 r9 A. C4 a( s$ O) t - try {0 c% j, I" n7 ^) S* F3 V! s$ Q/ g/ u
- k += (Date.now() - ti) / 1000 * 0.2;5 |' t4 f; c4 k5 f! C# N
- ti = Date.now();/ [4 G' N) m3 `, m( Q5 y. r
- if (k > 1.5) {5 x3 C/ z2 w( }9 [! x7 S
- k = 0;2 L* b) }1 ~, g. @' C' d0 p
- }
6 j% M+ m8 c, M9 `6 [" v/ u - setComp(g, 1);
' }0 k' s2 `+ k$ ?- x: N3 @, V - da(g);
9 L: r5 N% I# y5 e - let kk = smooth(1, k);//平滑切换透明度
2 f( ?* T4 w8 X3 _7 @ - setComp(g, kk);
: o. G, a( X% {( s/ [) }1 {* n/ O - db(g);( d+ M4 |+ q1 k" E+ G n
- t.upload();
' k& T, ]+ g0 K/ g/ i# z - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 V! F" `# l4 |" N- b - ctx.setDebugInfo("k", k);, [ h( `. `4 y/ y& V
- ctx.setDebugInfo("sm", kk);) L+ e! q- w8 f6 l) J& X. V( F
- rt = Date.now() - ti;
' u4 W3 d8 ~& C% b% S" L% V7 q - Thread.sleep(ck(rt - 1000 / fps));
6 N# H; J/ v% U6 o6 d: P* ~3 J - ctx.setDebugInfo("error", 0)
1 M8 ?( _6 x& C8 D% e' e# Z" m- R - } catch (e) {
- v* k- v) ?6 o& I. r* b6 `& ~6 N - ctx.setDebugInfo("error", e);3 J4 A$ G# g' ? n8 [' O
- }8 V& @8 I. k' Z7 l
- }
1 B7 M6 c2 }: M. o4 K' m - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
4 w$ R& v; m/ y - th.start();: d. U+ V% A. r
- }
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1 z6 d: S1 N" j# ?1 D' u- function render(ctx, state, entity) {
' D& W5 I2 p j6 K' k5 {- M - state.f.tick();
7 L3 I" w( p% ^6 K2 i& C T7 Y - }
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, Y- K$ c. k% w0 r) K9 a- function dispose(ctx, state, entity) {# r: q- T# s: s! W1 w
- print("Dispose");+ M/ R2 x$ |3 e1 `" [1 t0 P
- state.running = false;1 L5 m( M6 P/ E) I4 N
- state.f.close();
4 a- W9 F0 g$ j - }
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8 k0 X3 p! n3 t5 E6 `0 w2 u( d- function setComp(g, value) {
4 R1 Z! g" w1 X5 A# P& q - g.setComposite(AlphaComposite.SrcOver.derive(value));
+ N' [" K: K- `7 t% m - }
复制代码 # Q$ p1 D) {9 s" m" z
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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" h x6 M2 X [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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