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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 X% M0 h% m' M
- importPackage (java.lang);- W9 W6 M$ z. I a) R
- importPackage (java.awt);3 f# G2 }7 y' M3 m6 j% s$ p
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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* M2 \0 ?' Z6 h# X. ~4 l2 `% ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% G" g( y* j6 [
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- function getW(str, font) {
. P# b% }1 \- \1 ?! h: o - let frc = Resources.getFontRenderContext();: i! M9 ^' ^* `9 Q Y D
- bounds = font.getStringBounds(str, frc);! u' w( c# P5 s* l6 U
- return Math.ceil(bounds.getWidth());
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, L7 E3 O" k+ R1 B; j0 {, h- da = (g) => {//底图绘制
2 Z2 N7 D/ d* p J7 `5 ~: H! Q - g.setColor(Color.BLACK);
* b9 r3 |& O; V0 Q* a - g.fillRect(0, 0, 400, 400);
! k1 w/ v% b( b2 r; z" s, x, `9 T - }8 {1 {; z: N( i7 |# O- d
- " L# S. F- Y( d) ]
- db = (g) => {//上层绘制
; _1 k, L+ W P - g.setColor(Color.WHITE);
8 y9 N! L @) Z& J1 K9 b/ {. i - g.fillRect(0, 0, 400, 400);
, L( q6 d- p* C9 B( y - g.setColor(Color.RED);- R, I( J) D$ ^
- g.setFont(font0);% g" U' c: ?, {
- let str = "晴纱是男娘";
. A1 k. ~+ a& M8 a, m6 e7 s - let ww = 400;* @0 Q7 b% E, T$ G& [) \
- let w = getW(str, font0);
3 d1 t+ Z' M c. | - g.drawString(str, ww / 2 - w / 2, 200);% E' c! I: ]3 E7 d6 V6 X
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8 `( e6 N( a6 X+ T6 e, d3 i- const mat = new Matrices();/ {9 b7 b" @6 W
- mat.translate(0, 0.5, 0);1 f. \# l5 J# q' h- q1 _, k* ^
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- function create(ctx, state, entity) {
- K* X) Z8 s+ M9 I* A - let info = {. i2 l$ K0 P. J& u* m
- ctx: ctx,
2 a2 |0 |- s- o2 n7 |6 @( @ - isTrain: false,
! f# u6 B4 W9 F& ~1 p( T/ X - matrices: [mat],6 [; _) d( ~6 O& o6 M
- texture: [400, 400],
9 o$ u2 A, _: Q$ c - model: {8 ?& m' m3 @; B6 A# z: V1 V
- renderType: "light",) k' z2 D5 O2 W. F
- size: [1, 1],; v: U2 C% y. `' N/ |2 P
- uvSize: [1, 1]
% f9 N+ p/ }& b- R+ J( ? - }
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- let f = new Face(info);
4 [$ ^4 H* \( Y% s - state.f = f;$ l% x+ N" m& D0 v P( G
1 I& S3 ]* M: i! ~, e2 r- let t = f.texture;
0 V. U/ I2 j+ v# x - let g = t.graphics;
4 F: s3 |/ ]5 \ - state.running = true;" f0 J+ u( M, W* ]1 o" ?7 f
- let fps = 24;8 A; ^9 t2 X" d+ |6 y/ \9 N
- da(g);//绘制底图
& E& i9 p& s, [3 g6 M6 ~2 z' W8 X - t.upload();, R. J5 `8 q1 E
- let k = 0;
9 p! |+ C' d' r! w5 z6 a - let ti = Date.now();
, b8 {9 }* Q2 j' K z9 | - let rt = 0;
/ u* f4 V3 E$ u$ I0 U+ B* Z1 M - smooth = (k, v) => {// 平滑变化0 a9 f$ D) B' |4 F& l* F
- if (v > k) return k;
' O& a5 t x" D; V' D$ X! ~ - if (k < 0) return 0;" X- D! ~7 J* M. c6 f- _
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. `7 p/ D9 Z+ i# c3 k+ [
- }
# l) g, T6 V4 y1 B - run = () => {// 新线程
2 p U6 X F0 a - let id = Thread.currentThread().getId();8 e9 s4 ?- \" R2 D2 R9 F( p6 e
- print("Thread start:" + id);
) @1 [+ {; G) k+ {% A$ B - while (state.running) {- @- S8 O* J, O) t" T
- try {( d1 l: v( m$ L! U) o/ S2 C
- k += (Date.now() - ti) / 1000 * 0.2;
+ C8 r. S: P: k: s; O! R - ti = Date.now();
8 X$ H, ]" J& u9 ~( d3 P7 `% m6 \ - if (k > 1.5) { \ A, g4 u' b8 g$ q0 F/ @3 _
- k = 0;! H3 H. T% D3 e# M. r8 J
- }
/ a/ Z% l1 \: R; m& ^9 S - setComp(g, 1);
5 t$ n, e7 y# g) A5 G( I - da(g);
- l! F) A) V5 G8 M U - let kk = smooth(1, k);//平滑切换透明度& U, r' z8 r2 E+ T* c8 y& h
- setComp(g, kk);; w# n! ~1 a% @- K: i9 p$ a: R
- db(g);
* y6 @4 u; V( z- U) w - t.upload();, H) i) e7 q6 F2 X* v# q& g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
3 H# N7 U. S# f- R' I" i - ctx.setDebugInfo("k", k);" ~% ^/ f; q6 u- r: y3 M
- ctx.setDebugInfo("sm", kk);4 j0 _2 T; i4 _& e4 ~
- rt = Date.now() - ti;
3 `) Y7 q9 @3 ?. P4 H9 |8 W - Thread.sleep(ck(rt - 1000 / fps));3 N1 U, v+ r0 A
- ctx.setDebugInfo("error", 0): e* s- l4 A: H
- } catch (e) {* Y7 P7 Z9 b' y$ x$ j; I# \( M
- ctx.setDebugInfo("error", e);2 ?( C( m8 \6 x- u& U- p
- }
" [. e) @% x& U! g/ v7 k5 t! r$ D K! p - }8 Q+ ~ h# L# q: U
- print("Thread end:" + id);0 ^' ~- I0 u/ v$ o$ x& X
- }
- \3 s4 \3 i/ R, m' s: b - let th = new Thread(run, "qiehuan");- c1 h* V* D7 D2 K2 U
- th.start();
! Y o2 m" g2 T - }
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/ W/ r" D& l* w, \% \8 V8 P# Y. n- function render(ctx, state, entity) {
! N* B5 U" {6 L - state.f.tick();
! p( e/ Y/ e7 G T# k - }
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+ |( `" K* h) n3 K9 i- function dispose(ctx, state, entity) {& T1 W2 a0 [1 J3 X: c7 e @6 u
- print("Dispose");
2 ^2 h" A2 b @& `3 ^ - state.running = false;' ^5 d% h" F6 h" A6 l6 i
- state.f.close();. w+ \$ _2 ^8 Q% S. b! s
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- function setComp(g, value) {+ @1 w, T' H. p$ E5 ^( ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: s2 U! ^9 W7 j( O - }
复制代码 4 {; i$ r$ P& O8 V
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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