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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。
H- x% M0 f; Y: l/ V- importPackage (java.lang);. m" D( ~( A! J: ~6 u1 ~
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));3 `1 F# ]# ~( S
- g) Q4 k$ ]( T3 n, g# s" R7 F- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& c5 S* K. c) N+ }3 v0 {8 b( A; }
% Z1 [7 v4 {; s9 ?. L! S1 Z- function getW(str, font) {' a/ [( F- q1 \' D. i' K
- let frc = Resources.getFontRenderContext();! v {9 i& O& e# q
- bounds = font.getStringBounds(str, frc);9 B- [0 d) h9 E6 E0 q6 k/ _& _
- return Math.ceil(bounds.getWidth());3 b1 ~$ g, t# B. J0 d) |; ?$ G
- }; j$ [/ t& N4 R8 ~7 C; i
- ) _: B2 {, q; D% M- l. h
- da = (g) => {//底图绘制
' k( \! q' r3 O) g) U& W - g.setColor(Color.BLACK);
+ G! ?5 I, v; G3 j! e' b - g.fillRect(0, 0, 400, 400);- v5 \2 p! r# w2 T2 e! X
- }
6 ] P1 q/ c" \3 u' x& Y4 K
+ \2 K; f1 ?( J( h! x- db = (g) => {//上层绘制8 U0 l n8 K/ o& t" H
- g.setColor(Color.WHITE);
3 ~5 J4 Y! c9 y& f - g.fillRect(0, 0, 400, 400);
$ @9 w6 }! y2 ]) C2 u* o - g.setColor(Color.RED);, y' D* P1 D/ L; l! X1 k6 g
- g.setFont(font0);6 [( y& f* t1 U2 R
- let str = "晴纱是男娘";
6 {9 W. ?, B5 J/ ^ - let ww = 400;
6 W4 ]+ h# N6 @6 { - let w = getW(str, font0);
3 W. C: N2 R$ Q9 [% m$ \8 o9 b - g.drawString(str, ww / 2 - w / 2, 200);
5 T4 F F, l- }. Q A; v9 g - }" W* i- N" o3 o% `4 B1 z/ X0 ?7 [
- 3 G. W V* Q3 V
- const mat = new Matrices();
! O2 i. ~9 { z6 N9 T - mat.translate(0, 0.5, 0);% f9 p0 W$ h; `% g- I2 l- t" e" [
- " H Y) O) \7 O' Z3 c
- function create(ctx, state, entity) {
5 v, E( ?- e( p4 V: Q* b7 k - let info = {
- X) _; k( F+ [0 [1 P - ctx: ctx,2 a, E3 Z# L4 x$ d5 v# N
- isTrain: false,& s6 }& r% W) o8 \5 a$ y Z- b6 g5 W
- matrices: [mat],! |2 B! l9 |( @. ?: \1 `2 t( t
- texture: [400, 400],8 \" ~+ E S' Y* G# n! B. W6 p
- model: {
^6 b6 w8 O* K5 K. J$ [5 Y - renderType: "light",
: L, |9 A" U$ [ - size: [1, 1],
9 v- b. p+ t, q - uvSize: [1, 1]- A+ I. U C6 Q% P7 w! h
- }
f+ A7 W( {2 Q& X: r, y - }$ p0 u: q! e! ^7 W
- let f = new Face(info);
- T/ |$ ?& R! u' I5 S& S( Q - state.f = f;( F6 ^0 S. V3 L2 G
! W k( r% t/ K1 q( S3 O" L' Z- let t = f.texture;6 | n$ d; P( s) r
- let g = t.graphics;
/ e) e# W3 U: D7 x - state.running = true;
3 ~+ x# ~8 A+ s - let fps = 24;5 y, T7 t: Z! m. ~/ E; I) W
- da(g);//绘制底图
; n i, g! P. x. k - t.upload();" W# ?! X. P) `1 X
- let k = 0;
9 ?3 q3 H2 _" E$ ~9 [+ @ - let ti = Date.now();' z! U% o+ i$ g+ J
- let rt = 0;/ x+ U' d- Q$ L" m
- smooth = (k, v) => {// 平滑变化, q4 H/ `$ q8 Z! O5 }( b T5 Y
- if (v > k) return k;
6 A b! ~' {4 b - if (k < 0) return 0; y' B/ z# L7 r; \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 c" }& C0 K. s2 f$ x. e
- }/ z* g/ }& `! @8 H' `# e& `
- run = () => {// 新线程
* d; Q, ?& ~$ A a0 p - let id = Thread.currentThread().getId();
$ }( U( J4 x. w% Q& h - print("Thread start:" + id);
2 V1 O5 k h$ \+ A: e* H% i - while (state.running) {
' X5 ?& e' l. C+ f - try {0 P& `" q$ Z5 J8 t; W9 |8 [1 f- {; N
- k += (Date.now() - ti) / 1000 * 0.2;; O5 Z4 S8 w& f+ O* o5 @7 h
- ti = Date.now();1 Y9 \0 \6 U' h
- if (k > 1.5) {2 H) A" t5 b; |/ k- Z! E0 F
- k = 0;
5 G. D. W% [) V; @8 F- c - }
2 S& m) b; Y: E0 P. C9 x' ` Y( s9 E - setComp(g, 1);' L9 D- Z* m. `
- da(g);* }) Z/ {0 T5 r! W/ p) {
- let kk = smooth(1, k);//平滑切换透明度% r' \3 ?. w# q; O- G
- setComp(g, kk);
0 p/ q& q) v/ p9 W7 ~1 k L1 z - db(g);/ o" Q4 i, U8 R* D3 X( A; C
- t.upload();" n2 C" a7 s. {9 u
- ctx.setDebugInfo("rt" ,Date.now() - ti);: i- u$ ]1 s5 B5 k: _
- ctx.setDebugInfo("k", k);
, F c) }9 D2 g k: S( e - ctx.setDebugInfo("sm", kk);
3 \& I, ?8 m6 V9 H3 O+ z3 Y - rt = Date.now() - ti;
( R e O# P! o+ M# g - Thread.sleep(ck(rt - 1000 / fps));
9 r8 ^7 |2 f% V" w! ~ - ctx.setDebugInfo("error", 0)
8 |9 }2 y5 r$ [$ ] - } catch (e) {/ N. m- c. {2 ^3 o. q( u- Z
- ctx.setDebugInfo("error", e);
8 i( H/ p d1 O2 W7 p% K - }
; [. B9 j* w7 ^: _) I& Z* W* B - }# O1 `; L C1 Z7 v0 Z
- print("Thread end:" + id);
3 l* z* ?* b% E. b( _" V8 X - }8 f; K) `1 Q% O6 Z
- let th = new Thread(run, "qiehuan");
; `( ]# D" c, P+ x$ C - th.start();( v* ^2 s, |" {# a) c. Z7 n
- }
( }. O, j" V: s4 E
4 t- f' f5 s0 b7 N; j( z7 A5 e- function render(ctx, state, entity) {7 D7 ?- z" @0 w
- state.f.tick();. N7 z6 z4 D. S% R% |3 m
- }
& L9 c/ q- C$ n2 Y+ K0 V" N& Z - 7 q' i$ s. [# d2 s6 x
- function dispose(ctx, state, entity) {
9 U6 v+ c# ^# t7 G - print("Dispose");" s8 q2 o" t3 i+ H
- state.running = false;7 M" r/ m6 p* J& }0 S
- state.f.close();
- B+ R8 b+ z5 p8 f- t - }
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" G9 v& ?3 I( @+ t, {7 r2 _% a9 A- function setComp(g, value) {
4 u# }" U5 {& w3 [" t - g.setComposite(AlphaComposite.SrcOver.derive(value));
; K: }, s; {! V! B$ v* _! L9 N - }
复制代码
/ P* V/ k3 l% q, }! x+ n) [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。) r- L& x' } l( R( ]8 {7 E
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% _9 v7 U1 ]# Q* o/ N6 u顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' f7 ~) k' T s3 \3 a8 X" I
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