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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。4 k3 W# J* i+ |$ }* g6 a* g
- importPackage (java.lang);
- I9 [7 K8 j6 r1 [0 b. l& G! R8 a - importPackage (java.awt);- e6 C: U! U4 O2 F" B
- , L6 z4 v$ `/ D7 o# _0 q
- 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) {. r" C9 x" y+ u3 f( c
- let frc = Resources.getFontRenderContext();
$ z- T) s0 C$ g2 d2 q9 ` - bounds = font.getStringBounds(str, frc);& a* t/ s: @* l& v0 |; s9 y
- return Math.ceil(bounds.getWidth());
& ?+ y: o' E! M2 ] - }
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, V+ G- s1 r* l9 i, K+ D# P9 L0 s$ S; S- da = (g) => {//底图绘制
7 t7 J9 }* d) m& P w) t - g.setColor(Color.BLACK);# A, v9 B; P2 w3 p8 V8 M
- g.fillRect(0, 0, 400, 400);9 v- R" O; p. S2 J3 y
- }
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- db = (g) => {//上层绘制" n8 o+ y4 l& Q* {- i% c
- g.setColor(Color.WHITE);
5 @4 q: X/ H' x - g.fillRect(0, 0, 400, 400);
" ^# t+ |' J3 u4 i - g.setColor(Color.RED);: S$ ^( {0 F4 U/ B. R
- g.setFont(font0);7 K/ Y* l& S, ^ L1 X
- let str = "晴纱是男娘";, F# [! [: r" N& w/ d3 h& H
- let ww = 400;
5 V9 R3 H% _- y# M" N8 V - let w = getW(str, font0);
: J e$ l& x$ Z1 p - g.drawString(str, ww / 2 - w / 2, 200);
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- \7 y2 a& y4 y' d8 u% t6 |
- const mat = new Matrices();
: b. W' V/ {) M! {: B& y - mat.translate(0, 0.5, 0);! R2 ]) @. _/ z( X- {. m; m- F
- ; X4 O V/ Q( j8 u$ s" U+ Q9 @+ s
- function create(ctx, state, entity) {
% I" _) m6 N' N9 r6 ? - let info = {
; }- W8 G& x+ J; L - ctx: ctx, v" t# J, U; ?/ `' o! g: o+ i
- isTrain: false,
/ i+ W# I- ]; B; a( D4 S - matrices: [mat],, [% |# G* N% L4 R* X i8 Q5 }
- texture: [400, 400],( _7 x0 u& t; d( n$ z* m$ E* u6 V
- model: {
, ?# i- P/ J9 H2 o& M - renderType: "light", D: s% _8 K6 h% m, _; L
- size: [1, 1],
4 @" p( P4 x& b - uvSize: [1, 1]- m' G5 k& x- F* L( g
- }4 @. M. G" U$ Z
- }; a& g* d' _+ }) z* Y
- let f = new Face(info);
5 v5 B) M W7 |. F4 A: H - state.f = f;
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# _7 X- O; h3 r9 ]5 i9 G) d- let t = f.texture;" k1 I( d' [/ u# L7 i& R- q! w' L
- let g = t.graphics;
& F' ~- E+ \( d$ D - state.running = true;& T5 `8 J) L0 o0 I Q
- let fps = 24;
, Y. ^8 }' d9 S% } - da(g);//绘制底图+ ^% R4 X6 E: s- d+ b
- t.upload();
' |& z L6 L# h; L - let k = 0;7 n" z" J1 [- J. T- K; a
- let ti = Date.now();
! n+ e( j9 A( T7 y" E7 z+ m5 E( B - let rt = 0;% j: [( k4 c+ D" J0 s, e
- smooth = (k, v) => {// 平滑变化
, W$ R" Z' {5 B - if (v > k) return k;$ h- D! }/ ^4 \+ X
- if (k < 0) return 0;, N& }! r e8 \2 r) J7 o& ^4 i4 z$ D. y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 [2 k3 S+ @8 A0 g
- }0 q6 z: v3 _; r- y
- run = () => {// 新线程8 o8 k4 D, `4 L& ~) u: Q# H9 J
- let id = Thread.currentThread().getId();- G' Q: g/ ?# J% v
- print("Thread start:" + id);
5 i6 e/ i7 }) }5 G8 G* y) ~. G& J1 M# @$ Z6 z - while (state.running) {* L; g$ g6 {, B* O0 z7 a, K8 g+ L H/ D
- try {
1 k' j% p$ G: C; X1 X# b) v - k += (Date.now() - ti) / 1000 * 0.2;
4 F! S; x* R/ ?. _+ I# M/ I, \ - ti = Date.now();- i$ h; o; n2 P1 a: m+ l3 d
- if (k > 1.5) {9 i1 [7 F' Y" h/ e# p
- k = 0;, I9 P* z- j( a9 d) u3 F H
- }1 v9 D& j: Q! b! F3 S! ~" h- i# E
- setComp(g, 1);
: D# s* [4 H4 z& P) p2 ` - da(g);6 `' C7 h- u9 p- \
- let kk = smooth(1, k);//平滑切换透明度
; P$ x! ^; ?9 n( D0 B - setComp(g, kk);
: }8 u$ x; y8 h# e8 v - db(g);
# n/ p8 `0 D7 Y! }5 |' Q5 O - t.upload();; T( J9 S8 U# d6 b A. i% ]% p
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 a# }: F/ e" I( Q2 `' v - ctx.setDebugInfo("k", k);
# e; O1 J. n) k5 B" q9 q$ [ - ctx.setDebugInfo("sm", kk);
z- r1 t1 i& b" r9 r- A+ Z - rt = Date.now() - ti;
8 {4 l; [2 h, S. r# ]$ G! T - Thread.sleep(ck(rt - 1000 / fps));% Q6 m$ L. y) \0 W5 x- u
- ctx.setDebugInfo("error", 0)
7 C# I; D7 u/ x- M - } catch (e) {
7 _, C8 i- b0 e8 {* z x - ctx.setDebugInfo("error", e);0 A6 \0 {% J) D! L; `! q1 H
- }
9 A* M5 P( c( w - }
- Z; X! s8 H) H- r! d - print("Thread end:" + id);/ |! Z% b! [4 x `; |$ v
- }5 v& ?# H( @. X* t8 I( r
- let th = new Thread(run, "qiehuan");
9 h/ v* _- {: F% A. b/ V7 C - th.start();
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9 y9 N, q1 \2 A }8 e/ n: m) J4 x- function render(ctx, state, entity) {. L$ h1 F. X6 R' \' U+ d
- state.f.tick();" z1 H" n+ a n, M B, P- H
- }$ G1 t E3 d9 x2 B, ?8 _
9 {% N3 ]6 _/ V) r4 @1 O- function dispose(ctx, state, entity) {3 [$ R. l2 P. n' [' g2 C6 }/ o1 p
- print("Dispose");$ @& l8 o# j2 Z( _9 B- W
- state.running = false;
/ S/ O. t5 \* O/ V' n - state.f.close();
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) m2 z' t( B/ ]9 _2 L; Z/ \- function setComp(g, value) {0 L+ y, i; G( M5 n
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 v, X! S& n4 j! J4 ^" ^ - }
复制代码
/ R! W% z" s9 @0 a' J1 d/ l+ i8 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。
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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)$ S- M. {" O+ H \1 m. M* r
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