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. I$ ]9 r3 U i9 V. Q" d* y! V0 q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。5 d5 r0 T q" A# b
- importPackage (java.lang);0 L( I F3 C! L9 E: e8 t+ ]. G
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! W n2 S8 ]4 O/ |
- & q" w! j9 Q" y% H3 M4 y: y' c
- function getW(str, font) {1 U6 b: ]6 [# n
- let frc = Resources.getFontRenderContext();
8 U- W$ U/ N! c8 C - bounds = font.getStringBounds(str, frc);
0 s7 E8 {& v+ A, ]/ o - return Math.ceil(bounds.getWidth());
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/ c8 v i( i" V5 o }# m- da = (g) => {//底图绘制
* P3 Z, @+ h# J - g.setColor(Color.BLACK);
8 E0 X; X/ P/ A+ P( E: K* Q8 z - g.fillRect(0, 0, 400, 400);/ |" k6 N+ M4 `
- }
+ t) S! ^ l9 w$ v8 W$ X/ P - 6 f7 D; P2 B* S3 B# w& U( {
- db = (g) => {//上层绘制5 l, G7 ]+ G: P7 _ J
- g.setColor(Color.WHITE);
8 T* T9 E5 _1 a - g.fillRect(0, 0, 400, 400);
% d2 J N! O( z3 G1 c( l! X - g.setColor(Color.RED);* o6 t7 [7 I7 r/ @+ m. ?
- g.setFont(font0);- z3 C9 u8 x' e7 d# x2 ]
- let str = "晴纱是男娘";
; j, c+ e2 d+ V - let ww = 400;5 W- U6 A1 Z, g; y4 P) A! [
- let w = getW(str, font0);9 [7 j" R: Q" m
- g.drawString(str, ww / 2 - w / 2, 200);" U y$ w. g0 L6 X2 }2 A9 s
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- const mat = new Matrices();7 j; J5 ~1 W9 q$ v$ s6 `0 T
- mat.translate(0, 0.5, 0);7 d, \1 \& w1 B
- 2 N* N# P8 J' O+ P K% S
- function create(ctx, state, entity) {$ @9 F! }9 i/ @5 R
- let info = {8 k& K0 O+ v8 R7 |' t0 N& G
- ctx: ctx,
1 l i# J. h1 x/ Q$ ] - isTrain: false,
2 s2 h. l8 M% t/ e N4 [5 r1 p - matrices: [mat],5 c" h' t4 y: |* Z( ^
- texture: [400, 400],1 ?0 N7 |9 T4 s3 S! B% F. k) g
- model: {
( j! y3 Q$ Z: h% M - renderType: "light",
" X6 |5 M6 @1 h' t6 \) X - size: [1, 1],7 q" `3 p- J. T4 p' P ~! @
- uvSize: [1, 1]
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- }
" J! ~ L; J9 B- h - let f = new Face(info); {# l! v" I/ I, Y: h% k2 \
- state.f = f;; N+ V5 o, \# _
4 d3 C/ G0 a _6 U( k% x1 ^- let t = f.texture;* {- m2 s4 N* M p/ H" y5 @$ f! n
- let g = t.graphics;
! b9 r6 b) U' I3 z - state.running = true;: w: @8 W- Z2 ?) M& |% R P) C
- let fps = 24;
3 x/ J* k+ I! }' h- n3 a - da(g);//绘制底图# z/ F- T! B- G
- t.upload();
* B0 m3 Q* }4 z$ i3 ?- c - let k = 0;# @( L2 r3 I5 ?" B/ G8 T. U) o
- let ti = Date.now();% s. l% x/ G G1 b$ c1 N% r4 i
- let rt = 0;
; x. B9 j' ?5 Y# `3 w2 D) | - smooth = (k, v) => {// 平滑变化3 _& X" P% X+ n# u& R2 L3 D
- if (v > k) return k;
( D/ e; Q) p3 Y2 c* y, \ - if (k < 0) return 0;
. M% S0 X* E# K2 L* q7 h - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 C- |' _9 T/ m I/ m: [
- }
( q C* y, q, {6 R - run = () => {// 新线程& R" e9 ]) O) {$ J& a
- let id = Thread.currentThread().getId();
- K$ K1 U4 _! d; J) |# S - print("Thread start:" + id);
( n- @& G+ C8 c# z% U( g - while (state.running) {9 X% D- J) B. C, M7 z
- try {
% i$ Y3 j0 Z' m$ S - k += (Date.now() - ti) / 1000 * 0.2;
/ j& e/ g& f7 k5 c0 b6 q& o# f - ti = Date.now();
) b; N! K9 P2 }+ r5 w5 H9 s5 [ - if (k > 1.5) {5 H+ O4 O0 x0 w0 a
- k = 0;
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- setComp(g, 1);% b4 u- t+ M/ B7 y4 g3 y0 y" t5 y
- da(g);9 E* q: {. m# b& |) `, r" j: p
- let kk = smooth(1, k);//平滑切换透明度& X2 R4 Z7 t7 V' v
- setComp(g, kk);
`7 Z! @$ a! j6 V - db(g);
/ y" p3 [4 } R, J# q. ~) u$ V3 a5 T - t.upload();
: l. a" [: H% v) G - ctx.setDebugInfo("rt" ,Date.now() - ti);
* }( O q% D* v, B7 F' ] - ctx.setDebugInfo("k", k);
5 n" a1 Q1 g0 M( r/ |3 k m - ctx.setDebugInfo("sm", kk);
f8 A: O$ ]2 r6 _9 \ - rt = Date.now() - ti;
3 q$ f/ G7 V2 g/ k - Thread.sleep(ck(rt - 1000 / fps));
# j% p. V G$ j; o - ctx.setDebugInfo("error", 0)
2 ]% H7 O s; E! @' q! _ - } catch (e) {' B7 i+ H( T0 d- @
- ctx.setDebugInfo("error", e);
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- }. G/ x: h" z) Y1 I u: F) |
- print("Thread end:" + id);
8 i+ w! c: |7 o8 k0 m - }
) v/ G: n+ r6 \# n: z% A# l' V - let th = new Thread(run, "qiehuan");: M; u' Y6 y. Z# j: C t
- th.start();
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0 w2 E% G$ ~. \+ R2 h6 w+ F- function render(ctx, state, entity) {
6 Z" k o& |9 U# b - state.f.tick();
& I# X6 m; b" s* w% s9 o - }
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1 i F. [+ \( E7 o1 `" `0 L; p, z- function dispose(ctx, state, entity) {% W- N( K1 R! v1 k
- print("Dispose");& L: V3 ?* V* v# i2 d/ G/ }
- state.running = false;2 u9 l) ~" ?7 G' @4 d& e
- state.f.close();
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5 ~5 d" j+ r) G O- function setComp(g, value) {+ @8 s/ S+ G- p* O' F: `
- g.setComposite(AlphaComposite.SrcOver.derive(value));: [, Z$ V& e# S3 j/ G M: v% I4 S+ ?* j
- }
复制代码 . {" w- O( Y& p3 q# t; 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。
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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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