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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。+ v0 a# p" b5 `8 D6 I/ U
- importPackage (java.lang);" ~+ v: c, J5 w/ b( c* ~4 t5 w
- importPackage (java.awt);
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9 Y; z8 Y% w; e, s- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {% O }9 Z* X2 ?# d) s+ _
- let frc = Resources.getFontRenderContext();
, H% _' ]* T A" C - bounds = font.getStringBounds(str, frc);
. I# \& {. E) j: e s W7 u - return Math.ceil(bounds.getWidth());
$ Q1 J' I) _/ d! e7 @$ t' v% V& V - }
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- da = (g) => {//底图绘制6 `) t6 m& h! P6 `5 m1 s; ]9 G/ E
- g.setColor(Color.BLACK);
, D }/ p: H: r9 i8 n; | - g.fillRect(0, 0, 400, 400);
% E7 ]! g" X4 g* p* h4 C" x# J2 Z& O5 h - }
; \- j( Z3 Z, I7 p3 K - " }* ]( o& I% Q8 }1 ]! k% O
- db = (g) => {//上层绘制
% J, h) ?. J. B" V* h. l4 @ - g.setColor(Color.WHITE);: Y$ ^9 \ i" m% r: s9 L
- g.fillRect(0, 0, 400, 400);
" Q- t o, L% U1 K B7 M4 m# C - g.setColor(Color.RED);
' L- [" L9 w3 \. x7 v - g.setFont(font0);
; ^3 ~0 B. {5 o( f - let str = "晴纱是男娘";# Z/ \2 G; v6 O4 d) b
- let ww = 400;( A1 z6 J& {; J4 l
- let w = getW(str, font0);: X: l& ~/ g$ E/ n6 F ^+ G* D, e
- g.drawString(str, ww / 2 - w / 2, 200);
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) L$ E+ M6 ~5 d$ i6 x8 R- const mat = new Matrices();5 s7 G: g m3 w7 w" {6 m
- mat.translate(0, 0.5, 0);( \0 i9 b2 m1 e! B) v; G
( a {' n. F' f3 _$ u/ t+ B; Z- function create(ctx, state, entity) {
8 p' v% ?4 X3 v/ t1 [7 z2 y: B1 \" @ - let info = {4 G0 C3 n% O1 j9 O0 G
- ctx: ctx,6 h/ L+ ]# G# K+ [* ^
- isTrain: false,
* \7 U% t+ J0 [. h - matrices: [mat],
- `9 y* w: c0 n5 `" V- L- L) u& _ - texture: [400, 400],+ _" a7 ?( e3 f7 {4 \ b
- model: {5 Q3 T9 K4 g, G6 A
- renderType: "light",
9 e0 W7 g: j& W& i; C/ o1 x - size: [1, 1],
+ \7 p8 I" B+ F7 N% k/ Y( s - uvSize: [1, 1]$ e8 a( @& J9 S. r" C
- }! M( Q& C5 b6 G* e0 P7 O2 J; y: C
- }& g" c; D7 w" c" R0 O
- let f = new Face(info);
4 r0 g# ~. [7 o1 W' ?) i# E - state.f = f;2 V" o- U8 g5 }- m5 m! x6 _; R9 n
- 4 t; k* v2 z, z2 u5 v, L: o
- let t = f.texture;% Y* x5 N- a. k6 Y$ E$ v% E- M
- let g = t.graphics;
& U' C% w. t; y! { - state.running = true;
" \6 D! X7 P1 P - let fps = 24;
. D9 U x+ d+ x/ X: l% | - da(g);//绘制底图
* C. K4 p# x! I - t.upload();, {3 v8 S/ y2 {# m
- let k = 0;
$ a% ~* j- D: B- i; e2 }# [ - let ti = Date.now();! F9 K' K. i! D- l6 I6 x
- let rt = 0;8 |( O5 X- Q* v- R5 A7 J" z1 n
- smooth = (k, v) => {// 平滑变化
; `' f1 {; A2 \3 @8 t9 K - if (v > k) return k;
; T+ r; U$ c7 F1 B/ N - if (k < 0) return 0;
* X8 n% W+ R/ a# D ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程! l# g+ c5 z) L; T9 u
- let id = Thread.currentThread().getId();
* r& C. S' a7 p4 L2 F - print("Thread start:" + id);# O# B$ X7 j6 ?8 Z& Z/ u4 \% b: q& |
- while (state.running) {
! T: }6 M5 {8 R( \, ? - try {" ^4 a- @8 W6 ?! U; ^- p
- k += (Date.now() - ti) / 1000 * 0.2;( D4 z$ r# p: |" Q
- ti = Date.now();
w* I1 f Z$ G) y; j" g - if (k > 1.5) {7 {, M1 s3 U8 t* ?
- k = 0;- f& M: V9 ~3 Y+ E
- }
6 |! D2 f) _9 G - setComp(g, 1);
) B4 G7 i1 h$ ^" S* k) z; R - da(g);* P; N7 a/ g1 w# e
- let kk = smooth(1, k);//平滑切换透明度
" ~' N+ Y9 m% c* t; e - setComp(g, kk);0 Q& _3 e5 w; F( j8 T
- db(g);
' y' i! b# Z5 C8 c/ x* h. |8 r - t.upload();
# O5 V' ^7 ^! [" y - ctx.setDebugInfo("rt" ,Date.now() - ti);
# K* F) `$ s9 c - ctx.setDebugInfo("k", k);
% k8 K8 \- G6 n" U q - ctx.setDebugInfo("sm", kk);
, h$ B& N# R6 P* |- P, x3 Q' f - rt = Date.now() - ti;
8 v1 e- P* f3 e# ~1 l" o! e0 [ - Thread.sleep(ck(rt - 1000 / fps));$ t$ ^6 u, w$ `* D1 w0 a
- ctx.setDebugInfo("error", 0)" H5 D* _2 X$ Z o* W( U
- } catch (e) {! z: m8 G7 |- h+ r+ \2 D9 s ]9 z0 U" f
- ctx.setDebugInfo("error", e);
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- }
4 D5 ?* R; W4 W& y- e8 Z; r* ] - print("Thread end:" + id);
- R( L, E% _3 n; |; N - }
' V/ N9 g- l* y4 \1 t4 ~$ K - let th = new Thread(run, "qiehuan");) {& x" e$ @) v1 \- g
- th.start(); z0 L' r$ E/ ?" M# @7 U
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- 6 o7 o( {0 [+ d% Y5 ^" O% O
- function render(ctx, state, entity) {$ z, t q0 F. u( b5 h
- state.f.tick();$ O: W4 [! b& |: y; Z6 r
- }! @! f# s8 z% Y- g- @: n0 s
' U: i8 [: K+ ?9 P4 E) Y$ F- function dispose(ctx, state, entity) {
, o( E& q: p0 R/ w - print("Dispose");
$ G: ?6 c) A) u$ c) I) \# _7 u6 t - state.running = false;3 A8 {5 {1 ^- |; a5 d
- state.f.close();, E2 T+ K/ ? f3 W1 Q
- }1 ^+ |/ M) j* ?' t: {5 m
- * k( z8 p6 }; G3 w2 S$ ]2 U
- function setComp(g, value) {1 i0 g7 {6 P/ {6 @
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% T* E' o w) c" n s* m, z3 t - }
复制代码
0 \* X+ }! }: w' G1 o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。7 y* M) Y, q1 v" I! t
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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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