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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。
/ u- a" j# {5 P8 I- z- importPackage (java.lang);
( m- K% r/ Y4 P' o6 Z: R - importPackage (java.awt);, B( _# v4 f. h ?6 }8 f0 B
- 7 P+ b! O! ]+ N: G' ^
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ p4 _; |8 S# ~- `
5 `( {" m# ^, E9 B( k- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* H8 G% n# U4 M2 ^1 w! M
& C P4 k6 ^' O+ w; e. k- function getW(str, font) {0 n8 M+ c; T# |' v3 q; S% L
- let frc = Resources.getFontRenderContext();
; X* {8 A6 S$ l* ]7 K - bounds = font.getStringBounds(str, frc);
?+ Q9 |0 B4 X) r5 H - return Math.ceil(bounds.getWidth());0 b1 [3 E% n/ T
- }
- J/ z N R* _& @6 W - * d$ Q/ v W. k6 Y8 g
- da = (g) => {//底图绘制8 p; N' e! `8 a) A' H: A& \) Y
- g.setColor(Color.BLACK);/ A' N+ P- d! L' o
- g.fillRect(0, 0, 400, 400);6 D2 }" l& j- T+ ]7 T `
- }
+ ~* j; M" H& }
0 E' Q/ R& a! o: I7 }- db = (g) => {//上层绘制+ j' p2 \- h# p0 X8 |
- g.setColor(Color.WHITE);! l4 h( o( S# I/ t' E! I2 ~. h
- g.fillRect(0, 0, 400, 400);
+ B- S" i, }8 b3 V5 x! I - g.setColor(Color.RED);
! v8 S( w% h6 \/ Q; o - g.setFont(font0);, a' Z0 \4 k0 x7 b" p! l& G7 a7 x( J
- let str = "晴纱是男娘";( [& A. [: c! d( F4 P" [1 I
- let ww = 400;: x" U" ] {7 R1 c E
- let w = getW(str, font0);
: n8 r" f0 j8 H - g.drawString(str, ww / 2 - w / 2, 200);8 z3 W: S, c, \1 @
- }
D* I% R" \; l6 {% p: K
+ H/ B4 O0 {( L( G5 {8 @0 c7 |- const mat = new Matrices();
0 [ i0 K {; t5 q5 Y - mat.translate(0, 0.5, 0);. F, S- g k4 P; F* W
- * s3 A; { e# A* N2 i7 L" I
- function create(ctx, state, entity) {
, J2 s; f1 P: @' j; a- J - let info = {8 v; p* z5 f6 t j/ `0 I7 [
- ctx: ctx,
( w) N; b0 N+ L* I% m - isTrain: false,# l a1 V+ T( [/ x
- matrices: [mat],2 Q6 B+ s) c7 U$ q: {$ ]- `2 s
- texture: [400, 400],
% O2 E0 s1 ?# w8 b - model: {
7 @1 n, u4 Z( E$ D( `( w - renderType: "light",
2 B, i% F2 E( b% W - size: [1, 1],
7 C3 K. c$ I: ^8 w+ f3 t - uvSize: [1, 1]
. ^( T! e( n; N) w - }
- l0 B9 a5 t/ L - }5 z4 t' D3 g% d! ]9 F" ~
- let f = new Face(info);# |. u3 J" |9 Y+ Q, [ ]
- state.f = f;! @0 R' M; @# O Y5 t
; [ D* I5 D! O9 i3 p- let t = f.texture;
" P+ A0 S; W5 E2 M7 U - let g = t.graphics; n. K6 ^ O* N* n: P
- state.running = true;
# ]: j4 ^+ v: u - let fps = 24;
Z+ H8 h" t0 m C5 H3 k+ D - da(g);//绘制底图: q0 M) }3 M5 l" p, S* ^ U" S) d8 ]
- t.upload();# Z( w. d% ~8 M5 `
- let k = 0;
- }! B) w" X$ q+ t5 ?- R - let ti = Date.now();
2 d7 v: ~* U" \( M7 J - let rt = 0;" v/ V" S% J8 x( i
- smooth = (k, v) => {// 平滑变化4 ^, a8 ]" U! \' [& i7 l6 m
- if (v > k) return k; X1 O, R) @8 q3 d, y
- if (k < 0) return 0;- I& N& N$ D. J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; V; h- |! L4 @
- }9 M, V$ a. N+ s8 d
- run = () => {// 新线程
- [8 h Y8 b- w - let id = Thread.currentThread().getId();
: r+ r4 C, e% a2 q0 _' B ? - print("Thread start:" + id);
3 p4 {5 z S4 Y0 d' b \ - while (state.running) {8 S% k7 {) T2 `3 G& P* M7 k
- try {, M3 T+ {! s+ z" v, n1 G7 V0 T( u$ r
- k += (Date.now() - ti) / 1000 * 0.2;6 u! d7 y0 L* F @3 y
- ti = Date.now();
, W0 X- U3 H' v - if (k > 1.5) {6 N0 t, e! B. J" X% L, f. j4 E4 C8 \
- k = 0;
# ?" _; }' a1 y$ U8 q. W1 I' ~3 |8 q - }, }0 a% h- A6 D5 C$ k, k
- setComp(g, 1);' x/ V& X+ o) h+ s; d
- da(g);
" ~3 @. }& C# F2 ]$ i - let kk = smooth(1, k);//平滑切换透明度, e8 P$ ?8 ~4 | i# _
- setComp(g, kk);3 V4 [ ^8 W2 w+ c
- db(g);
_" K, {# E& e - t.upload();8 \' B7 X7 q/ B# [0 v1 G
- ctx.setDebugInfo("rt" ,Date.now() - ti);
. e: {; M+ @9 H* M - ctx.setDebugInfo("k", k);. l9 a) x& t% }
- ctx.setDebugInfo("sm", kk);
2 l) I, [. J4 H/ G7 D - rt = Date.now() - ti;$ ~, V9 B1 e* r
- Thread.sleep(ck(rt - 1000 / fps));
0 D: D! N8 r+ S2 k; U& c/ F - ctx.setDebugInfo("error", 0)
* A7 @+ s- O( p5 @# Q& x - } catch (e) {+ T, V8 I! ]' Y" H3 a+ E9 e
- ctx.setDebugInfo("error", e);
. c& d8 v0 X$ C" L - }
H) U+ v4 v0 k& U) k - }
. b+ }7 K i9 L( v8 [1 l - print("Thread end:" + id);
. E K# L9 _6 ?$ w, x$ m - }- p% y$ {" _& N+ ?6 k
- let th = new Thread(run, "qiehuan");2 F- G/ `8 W% h
- th.start();
+ l! e5 h6 y5 f$ j. }' w - }1 Y2 t+ Z% j" v8 r' @% O
- 3 _; \7 u/ y- j+ Z
- function render(ctx, state, entity) {5 a$ n0 C ], a# T* o2 h `0 B
- state.f.tick();# ?5 c' \, w3 G+ T, e* C
- }
$ R7 g+ E5 I5 W$ l
) v( K4 J+ C1 E: j3 T- function dispose(ctx, state, entity) {. u7 g+ b+ \$ Z) v: h1 _$ t4 q
- print("Dispose");6 u- A; I$ U Y
- state.running = false;( a7 c3 A" w5 g3 I
- state.f.close();) o8 r3 ^0 _& M3 C7 \
- }
; x" ]) `& `1 D - , m0 c/ F" B* w$ g8 s* A
- function setComp(g, value) {
. P+ `! Z$ f% O8 E1 h - g.setComposite(AlphaComposite.SrcOver.derive(value));
! W' \9 \5 m& c0 g" g5 A - }
复制代码
, C' n# d% G: g2 F( g- t4 ~" 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。& {; z5 v4 K f' x
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6 }! [8 x- [4 K* R- e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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