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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。# g1 L5 T3 P8 P9 v( q4 A
- importPackage (java.lang);7 ?. b- S5 S& G8 V2 b
- importPackage (java.awt);
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0 a) j O* D) x j8 w% I7 _- include(Resources.id("mtrsteamloco:library/code/face.js"));
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8 z9 D! t7 s' n. o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% Z' E( a) R0 }2 b R3 q, H G7 `
: @; C; `9 i; u) k3 p5 n* A- function getW(str, font) { p9 b* N# ?% y$ c8 S& O6 |
- let frc = Resources.getFontRenderContext();
, p+ E4 q- d: ]* h - bounds = font.getStringBounds(str, frc);& ]. r4 x" ]" ]
- return Math.ceil(bounds.getWidth());
' a& ~& p. x' b# ^6 z8 W - }
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/ W1 v# _4 \$ z3 S6 p" h- da = (g) => {//底图绘制
- {3 w; [ @0 F! `" } - g.setColor(Color.BLACK);
! R7 J7 g/ k1 m/ X - g.fillRect(0, 0, 400, 400);
7 t" ?( H& K( {0 ]* r - }( Q- i" o4 a) q5 J" _
- / l5 _3 Q! ~; [/ H( B
- db = (g) => {//上层绘制% K7 }5 v. s- x3 H' I
- g.setColor(Color.WHITE);
0 J6 H/ n) l: P8 J# Q+ A - g.fillRect(0, 0, 400, 400);8 V9 ~' {3 \) M
- g.setColor(Color.RED);# u9 E0 N" Y# E
- g.setFont(font0);. t, c- u, ^: f# z4 e, J
- let str = "晴纱是男娘";" \/ B6 z9 l: b: H& v
- let ww = 400;9 A9 D8 v) b& X$ e/ H9 I9 H s
- let w = getW(str, font0);
! s B9 x! n( C& G1 u6 A - g.drawString(str, ww / 2 - w / 2, 200);
/ j# F: N# m! D2 q$ J - }
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- const mat = new Matrices();& G3 Y2 `" ^% y. \' i
- mat.translate(0, 0.5, 0);
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5 V. w# {: G1 ?: \- function create(ctx, state, entity) {
. ~$ Y' a2 Y. h- V5 f. w0 J - let info = {
/ S0 S4 n$ T/ {$ L+ ? - ctx: ctx,
5 t6 p: P% R4 H+ i$ U4 N" u - isTrain: false,2 j& C* F5 U; S6 {0 [
- matrices: [mat],
/ W4 u! \+ O1 O0 |4 P D. K4 O - texture: [400, 400],
, {2 T! k7 t( B$ w+ W# O - model: {
9 `. g& c0 ]7 y - renderType: "light",, `: J. W" o; {& ?( \- R& Z
- size: [1, 1],
8 o' J, M4 @) u( j" j; \7 T - uvSize: [1, 1]* r) d3 _4 n+ l% p/ ]+ C
- }
2 D' j. G, j- @* o% A - }
( M# x9 h! g6 K0 u- k - let f = new Face(info);/ I6 k% C2 y! Z& r2 E4 a; A
- state.f = f;
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- let t = f.texture;* |) t1 F! h+ n" d+ h7 A$ v5 a
- let g = t.graphics;
. Y* q J$ ]3 `4 M - state.running = true;" j9 F9 g4 O* H; j$ F' C7 S
- let fps = 24;
6 c& a- t" c' F3 q - da(g);//绘制底图
0 C- N! [( t2 z- b0 D0 A6 z - t.upload();
2 }* U# }7 z; W( |# z - let k = 0;. a' o/ U! ~- k! G9 S
- let ti = Date.now();
5 M1 w8 H# H9 M$ P7 b& {6 } - let rt = 0;
+ |+ p8 F$ r! R' W: o - smooth = (k, v) => {// 平滑变化
. J J6 R: e& w' L - if (v > k) return k;1 }1 j; o4 ?# |/ A1 Z+ g- _
- if (k < 0) return 0;
$ D. R( ?3 E% {7 C" p! a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) B- ~8 `* f- X
- }
4 d, m% v0 ?9 P$ V* Q - run = () => {// 新线程
/ B8 q7 K6 d" Y - let id = Thread.currentThread().getId();
4 F! l- D' s* k8 }6 n+ m; D - print("Thread start:" + id);
# [/ k& W: h' @ - while (state.running) {4 D6 q+ s, r) Y9 o
- try {* _9 q- A! ^4 X
- k += (Date.now() - ti) / 1000 * 0.2;. P' z. B7 @8 h) E0 f
- ti = Date.now();7 K1 ?: j$ Y' y& N# F
- if (k > 1.5) {
+ q, H" L2 B% m7 A4 t. Y - k = 0;2 n6 B/ _; _. K
- }' ^. [4 ~2 R3 e! T- @9 {
- setComp(g, 1);: M' ~" j4 B, Q. P
- da(g);
/ V- D$ ~) u* l1 v0 D' ^ - let kk = smooth(1, k);//平滑切换透明度
4 w6 j) u, Y$ N - setComp(g, kk);1 a, j7 q! e& p5 S7 X1 ^% Q( C
- db(g);
! k# G( n1 V: O# i" L, L - t.upload();* ]% p1 ]: w, }3 }" I* S
- ctx.setDebugInfo("rt" ,Date.now() - ti);
$ O$ q& h: E9 n* x( Q - ctx.setDebugInfo("k", k);
B6 W# `2 n* c5 A/ \5 F - ctx.setDebugInfo("sm", kk);
( z$ Z/ u1 t- z7 [% { - rt = Date.now() - ti;4 q, r& F8 \4 `$ P4 c/ s
- Thread.sleep(ck(rt - 1000 / fps));8 m6 A, i' v! L- k% Z$ S6 P
- ctx.setDebugInfo("error", 0)
1 B# [2 L3 U/ }. a: K3 } - } catch (e) {
: L1 j4 }, `4 }5 c0 _9 C - ctx.setDebugInfo("error", e);1 J/ ?2 l8 e7 R2 e+ e4 X% b% @
- }
8 u, L2 x$ ?2 U - }7 g2 J3 s5 ]" c; O7 X) }
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
, y: H& d5 b# L/ x - th.start();7 L( c- D: h) C3 n
- }
/ |$ |! i' s$ c( R: e$ O. J0 V
5 }9 p. O- ~* J& v- function render(ctx, state, entity) {5 R0 i5 Z$ c. w6 i( y
- state.f.tick();& k% W. a" |, ]3 K2 c# F9 J
- }1 `/ i9 N+ w2 N& _4 j
( X7 i/ V: O8 R4 \- function dispose(ctx, state, entity) {
5 S9 q1 U( O) Q7 L - print("Dispose");; ~' V! Q3 f" V: F
- state.running = false;
+ @. }0 B0 S- k, Z5 w; R* X) @ - state.f.close();" o5 r; b; K+ U& u9 `/ V5 Y4 ]: o
- }
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- function setComp(g, value) {% x$ n6 K' X6 n5 j2 b8 U
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ x4 ^" u0 e0 v; P( V% g+ ]. P
- }
复制代码
+ x( a; ?6 F8 E* m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。: p2 B" p- [- g7 P- e) V! B" _( G
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) E/ y# K7 n; b2 q# d) i顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)1 f/ Z$ P$ A- R$ f6 @* @7 D" o! [$ P
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