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: ^9 c/ l r5 l6 O* |& s. j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 K9 r, P7 D+ G( f# V3 p- importPackage (java.lang);
! y0 Y! z6 A" z1 r, H8 }) P+ z" J - importPackage (java.awt);8 W" j9 d0 m) c- ~3 p
5 F' P2 o t' ?' ]* k" Z1 O- include(Resources.id("mtrsteamloco:library/code/face.js"));
! M8 R/ n% I$ J% m' H. U - 6 ?9 m- E) r& {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 u& A4 f$ J2 F- v8 D
- 5 ^' I9 o9 h% q. V6 E- c, s
- function getW(str, font) {. Q2 z. F( g v
- let frc = Resources.getFontRenderContext();
+ ~" |6 x2 I$ Z. l( v0 | - bounds = font.getStringBounds(str, frc);, k. M, z/ x# f. n
- return Math.ceil(bounds.getWidth());. C0 m% o$ D' {4 F7 J
- }
3 v8 c1 `$ c3 Q8 \ { - # p* M, a( E* q$ a {
- da = (g) => {//底图绘制7 [8 t* x t$ f+ Z t
- g.setColor(Color.BLACK);
4 l$ Z8 }3 s4 i% H( N$ `: C' z - g.fillRect(0, 0, 400, 400);+ [' g2 n3 p- r7 F# k
- }
! E0 M8 u. X: @$ Q) j- ]2 L; f - 1 [, L& M# S @8 M, Y, @3 o0 g
- db = (g) => {//上层绘制* p% s& w: |- {" e/ }9 i) p
- g.setColor(Color.WHITE);0 `( H8 m! p3 Q' Q) e; ?
- g.fillRect(0, 0, 400, 400);
9 h, I7 f, C& Y1 M% s$ K. B - g.setColor(Color.RED);
3 w+ ~+ a, Y U* v - g.setFont(font0);) g4 [5 I9 `3 `% y7 t
- let str = "晴纱是男娘";$ k; Y4 K2 ~6 U8 k
- let ww = 400;
0 ]& p. Q+ \8 K: \9 l) R- c - let w = getW(str, font0);0 a L L0 F% D8 D0 r3 ]9 I
- g.drawString(str, ww / 2 - w / 2, 200);0 Z" L0 L- G+ g
- }* ^2 Q* p; @% ~7 W0 V& I- D9 P' `
- 3 B; \* v7 q8 x( N) G; N
- const mat = new Matrices();
$ k2 s2 b$ Y7 y9 H - mat.translate(0, 0.5, 0);3 L; f# \# m L. X0 T/ K
- 4 c- h% V8 J; E/ S/ O9 v: |
- function create(ctx, state, entity) {
3 v' D5 g/ p6 Z3 _* c$ H8 x, X - let info = {
& [" y' `; z8 J' Q& \7 X- I - ctx: ctx,
$ J& t: u. Y6 g( b" P. t8 c0 J - isTrain: false,
) J* ~- g! e% _* a$ [* c% I - matrices: [mat],9 ?! k2 F. |1 [, [
- texture: [400, 400],9 Z/ N- e, v- q, ]: B+ J: _: N' g: M
- model: {
- w" A |: y3 [8 R - renderType: "light",
. N- Z" M* }8 w7 w3 P - size: [1, 1],9 |2 @. M$ v6 G- P
- uvSize: [1, 1]
" ^$ L0 d: @3 @+ m9 P4 N - }
" q& S8 H' d6 ]' N - }
. l$ x$ Z U. O5 D - let f = new Face(info);* G* [, e6 y; [1 C$ [5 a* q
- state.f = f;0 y* G7 N( J# A' T! F- Y
- , y! q* O) P- f1 o8 I+ V
- let t = f.texture;
7 u! K& t n9 l* {+ o1 Q - let g = t.graphics;- Z& d3 e W: C
- state.running = true;( _4 X8 F1 i6 e/ i* i7 X
- let fps = 24;; D5 L+ A& b/ h' I% A! {
- da(g);//绘制底图$ Y4 U' |1 o; z3 M; F0 c9 Q
- t.upload();
5 Q% ^% V4 X9 H, z0 v - let k = 0;9 h" D% [9 h+ y% i
- let ti = Date.now();
, A/ D+ X7 Y/ D1 w* | - let rt = 0;
- ?1 }9 S/ |5 J: v9 p* b+ I0 L - smooth = (k, v) => {// 平滑变化$ P. y5 [2 q8 [, ?1 P2 |/ l
- if (v > k) return k;
+ p9 A5 K5 v( g9 Q% I+ m" @1 j& p - if (k < 0) return 0;" c# N2 }9 [( A1 k, ?8 M% V5 k/ o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 r# |( v! \4 K/ Q
- }8 K7 ~0 ^$ a; y0 P2 z: y% M
- run = () => {// 新线程# D& S* w* Y6 O! y( w7 H
- let id = Thread.currentThread().getId();) m5 O& V5 y* d% F w1 ~! B
- print("Thread start:" + id);
9 d, v7 t" r& d - while (state.running) {
; R9 `1 s3 T4 w( ?5 ~- M7 a - try {
8 k b$ K+ j" H6 w) ? - k += (Date.now() - ti) / 1000 * 0.2;. i' V- c+ p! U& y2 }/ n
- ti = Date.now();
( J2 e8 W: W# j3 K5 ~# j0 P8 K - if (k > 1.5) {
8 E9 X: G8 f) Y - k = 0;1 R0 x( r0 A% g, |! H2 F
- }' X' Q0 Z: V' |6 N3 K2 \
- setComp(g, 1);/ [+ |% g+ G; r# q# M/ W
- da(g);- e2 s0 z7 S% f5 T, b
- let kk = smooth(1, k);//平滑切换透明度/ d3 k$ D& X. r; g0 Z8 u$ U' Z
- setComp(g, kk);
; e, r3 O; Y+ \8 r% S) p2 @% V5 e% t - db(g);
3 }" p) I- O3 i% o* K! h - t.upload();
, V7 s7 G" C1 [; P1 n" ^ _ - ctx.setDebugInfo("rt" ,Date.now() - ti);
. ?: j4 y! x/ ]( `/ i( j* M - ctx.setDebugInfo("k", k);
& W% p6 \" b9 @! c) w7 e - ctx.setDebugInfo("sm", kk);
1 i$ Z, x- f: E5 G7 G3 B5 r( [) Y0 V8 f - rt = Date.now() - ti;5 `+ n: F1 e" Q: N: @
- Thread.sleep(ck(rt - 1000 / fps));7 b; s& @* A. h
- ctx.setDebugInfo("error", 0)- a- U: q8 T, J$ T4 r9 ~1 }
- } catch (e) {4 X- M0 ~ s! v: c0 B3 C: f
- ctx.setDebugInfo("error", e);
0 t Y! O8 w1 q - }$ Y7 {% H; e6 X* L' w
- }" ^ J5 I' Y$ \4 P
- print("Thread end:" + id);
5 B; R( K$ m% G; J8 `- Z' G1 ~6 P - }
8 V, ?- \+ B( b/ g* Q, S9 [ - let th = new Thread(run, "qiehuan");
" p0 c" ~" N2 L; o6 L P% c+ w - th.start(); Q( N% P7 I1 R6 J- I
- }% F5 I; x2 \/ k* R& |
- - g$ n7 V) d2 a. J
- function render(ctx, state, entity) {2 u: _) s4 [: Z: P' A
- state.f.tick();: ^4 V$ d3 b6 X9 O, [
- }
/ U7 e8 s {0 [6 H# l( \
/ G5 h, a/ z9 p* V- function dispose(ctx, state, entity) {# q. `; k3 }5 T1 ^. W [. S
- print("Dispose");
( k! @! X2 l- `* I' h* f9 Q - state.running = false;
& Z* N' Z8 `# W3 H - state.f.close();
! J2 i6 H& ?" Z! [+ {3 _* b; c - }
" N$ A9 {1 h+ e1 K, ]0 I - ! I& P# t9 l& ?4 ]6 {1 b
- function setComp(g, value) { w9 D0 E3 ?/ }
- g.setComposite(AlphaComposite.SrcOver.derive(value));& K9 [* z/ a; q" x8 x# ?/ _
- }
复制代码
- z% H* N& w7 n. Z' {0 }- C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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5 L! d# x' S, h$ z+ x0 u$ C2 ]9 C/ s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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