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- d! I& e1 [2 b- Y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。
" X- Y; Q; d8 Q% H0 N- importPackage (java.lang);
/ Q+ P9 z* X( t; j; F- F$ j6 z - importPackage (java.awt);, D0 l, F3 M# }: j
# T7 y1 f7 ^2 p; D+ Q0 P5 w- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 Q t; d& E! m5 Z1 V- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {! r/ n: i& T( s0 ^+ {' u, E2 B
- let frc = Resources.getFontRenderContext();9 A# U* w$ Q. w8 E. F" c1 S
- bounds = font.getStringBounds(str, frc);
8 W- D. w0 B& n f/ R! _* U - return Math.ceil(bounds.getWidth());/ H8 }$ S! v' t- t" @( g
- }
4 J! m, ?$ ?9 W# a3 e+ u% A- n
# E$ R; c0 M- V- da = (g) => {//底图绘制
( R; [, s6 K$ N" a$ i1 i: W c# x - g.setColor(Color.BLACK);- V' x: r0 a; P+ ?8 j& x
- g.fillRect(0, 0, 400, 400);
u8 w* u# |* M: B - }
' d4 Y- y+ Z7 @* P& S" g9 d$ o% P
+ s; M$ |7 L& b2 }- db = (g) => {//上层绘制
4 }3 v4 U8 Z6 l9 d# h - g.setColor(Color.WHITE);
: g. V. P" G2 h+ ^2 | - g.fillRect(0, 0, 400, 400);
3 h# S8 n8 F- u a. E - g.setColor(Color.RED);
& P9 u# T- e, }3 D& y4 ? - g.setFont(font0);# a2 r& o% @4 @5 ]. q$ ~0 I& n
- let str = "晴纱是男娘";& E1 T& c% t9 p! @ ?
- let ww = 400;1 u/ l9 L6 ^. d+ X
- let w = getW(str, font0);
7 B6 R* v0 ^7 p$ j) n+ n - g.drawString(str, ww / 2 - w / 2, 200);6 U$ b0 p3 \7 C' y' t7 r H9 t
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, t) i% k# X* a; u5 E- const mat = new Matrices();
+ i* K' H+ W( I* t2 K - mat.translate(0, 0.5, 0);
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! q/ p& o& @" e3 V5 ~; h; n- function create(ctx, state, entity) {9 i6 F$ E# I/ a' C' r+ }
- let info = {
5 d2 D; `. u8 d - ctx: ctx,: C% }5 l, C2 q/ y6 a
- isTrain: false,& O: z/ ^4 n8 ~) N* J! b" r
- matrices: [mat],, m) p: J# W* U, M
- texture: [400, 400],
$ Z# E9 S ?; v0 M& T9 ^ - model: {$ a) W Z3 _% `) Z; L8 a- J" z) j6 a
- renderType: "light",
" J* Q+ X3 S+ n1 W7 g8 \* | - size: [1, 1]," `1 S, k- J1 m, v
- uvSize: [1, 1]3 y" P; F0 ^4 \2 v$ C& F
- }: f& M: X4 ~: E+ `; ~
- }3 p0 L2 f7 X& v8 n) F6 S
- let f = new Face(info);
9 }7 W H% I% q- G% } - state.f = f;* t& {* d9 h' X& ?, q& }; l
- 2 L3 S8 [# g+ A r# X# ?$ R- h
- let t = f.texture;. v, G1 X. T& S L( ` ?
- let g = t.graphics;
2 f' Z! n" _/ _6 }; w {% y - state.running = true;
2 H7 V) V& y* h - let fps = 24;
# Z3 @! n2 \4 [& z& b - da(g);//绘制底图" ]/ \2 K: D: v4 Y0 \* P
- t.upload();4 J/ P7 N/ x; Y6 K
- let k = 0;
1 {* A- u% Z+ [9 S# L/ B6 f' M - let ti = Date.now();
/ Y: {$ {& |6 s& F2 f1 u% k - let rt = 0;$ Y; g0 e1 a2 n. Z
- smooth = (k, v) => {// 平滑变化3 ~6 t& d$ j. e6 Q2 M3 r5 q
- if (v > k) return k;4 F; o: C& _ w" E1 @
- if (k < 0) return 0;
0 j) n% N$ ?9 {% | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& ~+ P* ]% r+ w4 i* D3 J% f, ` - }, r( K3 I+ q/ j9 L7 \; B8 A
- run = () => {// 新线程. T) L' V, t3 f
- let id = Thread.currentThread().getId();
. f0 S. x' {4 b4 \: O2 A, C - print("Thread start:" + id);
R4 d' H/ t/ t3 r" | - while (state.running) {
) }5 F A& p3 ` w - try {* K- h3 f9 W- c# h, b
- k += (Date.now() - ti) / 1000 * 0.2;9 i+ m* [) f. u. e5 c( I
- ti = Date.now();4 w; x* X S; ?7 m
- if (k > 1.5) {1 U+ e+ U0 u2 V, d# h( s
- k = 0;
! m- E4 o. z- U. n. R& Z. b/ L4 ` - }
% H: E5 S' X) Y$ Z2 Q6 e y - setComp(g, 1);
! m7 k$ \3 x. s d+ G8 H - da(g);
( W) O/ y8 f4 F9 ` - let kk = smooth(1, k);//平滑切换透明度) O1 E1 s0 q+ B# k' `% L
- setComp(g, kk); \& _, P0 h, d5 ?) ]
- db(g);7 q+ W3 R# W0 _
- t.upload();" l9 \/ y% x' @3 |$ ^/ `8 `% m$ m
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 I" U+ ^! I2 [
- ctx.setDebugInfo("k", k);
1 L- | k1 ~, e5 H; _ - ctx.setDebugInfo("sm", kk);% Z! B/ G' b9 Z+ I6 O, T
- rt = Date.now() - ti;5 P! l3 o$ E4 z) z) ]
- Thread.sleep(ck(rt - 1000 / fps));' F4 \8 x- d% ]1 [! t2 ~+ I
- ctx.setDebugInfo("error", 0)
9 f" R( ^ c$ P; _8 q) d) x - } catch (e) {
3 K. \% N7 Q: b - ctx.setDebugInfo("error", e);
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- }! X+ w ^5 V/ U: ~. U4 i, D
- print("Thread end:" + id);
, t1 w, Z, A+ s4 ]' D - }
! `+ j4 q6 w; U - let th = new Thread(run, "qiehuan");
7 I1 j A# K8 q2 P7 F3 e) _% ^ - th.start();) b+ i2 Y( z; F% m9 ]
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- 9 A7 ~' f) e1 A5 ]8 B9 H
- function render(ctx, state, entity) {5 T: L/ j& u \4 A
- state.f.tick();: O9 A" N3 _, e4 ~# v
- }
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% o t9 A z% O! [5 N) P% a- d- function dispose(ctx, state, entity) {: I) n6 s* L3 U$ O" O( w
- print("Dispose");' D# n T) D5 O X8 S! V
- state.running = false;9 B: [5 M3 \7 h* I* _' e* w" ~
- state.f.close();
5 s, e; q; j, g$ V7 o/ h8 {. y - }
4 `& r4 N' H6 r5 X) e4 H - . l! ]! Z) P: l( A- O o: m# r
- function setComp(g, value) {
6 C- a7 R% d, D( z9 ^/ a - g.setComposite(AlphaComposite.SrcOver.derive(value));
! N* D' R# i7 T2 H) H# h - }
复制代码 - `4 H7 v3 B4 d) Y
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。, d1 P6 d7 d9 ]5 M& x
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" r4 s: [) C/ [顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# }! N; O, d4 b' @' s
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