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- `$ m( K% Q8 n+ p# h. G& L0 r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。
1 A3 o/ W/ ~' k2 V! J- importPackage (java.lang);1 p5 |4 g0 Q6 Z+ ?* ^- v8 Q: n
- importPackage (java.awt);0 d! c* ~ ~2 o) n2 }
- ) V, J! o( l) Q* ~4 m" Q
- include(Resources.id("mtrsteamloco:library/code/face.js"));: d0 ]; r5 i1 f- l3 n0 U
5 }+ b) R$ h% O, k. A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# t) O8 {3 Q+ o( a* K, _
) S1 `- Y3 C3 `- function getW(str, font) {
! O G# ?5 @. p0 S - let frc = Resources.getFontRenderContext();) ]* a7 @/ ?0 x
- bounds = font.getStringBounds(str, frc);" H$ F2 F; O% A
- return Math.ceil(bounds.getWidth());) |9 B! x& R+ y! ]- j
- }
) K1 k( S' c$ ]" v7 V( K& O
9 V' j b+ r7 E; o+ H+ i, `: ?% ~- da = (g) => {//底图绘制* C# I8 b. J8 w8 |
- g.setColor(Color.BLACK);
" P2 ^) Q# C1 V - g.fillRect(0, 0, 400, 400);
, ]- C4 s- C' b" Y8 t - }6 t4 X+ F* w; J
- 6 P9 {! X- q6 L$ g
- db = (g) => {//上层绘制
+ }& d3 k Y" H# t - g.setColor(Color.WHITE);; e- a ^; e; [" U( X& ?, ~
- g.fillRect(0, 0, 400, 400);# N. ~/ P7 _ x5 x
- g.setColor(Color.RED);
- E- H( ~9 d3 j0 Y- G+ F8 w - g.setFont(font0);
8 J) B' u4 X* f1 N& Z5 k' i* _ - let str = "晴纱是男娘";# |9 l7 s) Q, s+ y1 F, Z3 V
- let ww = 400;& b0 X& _$ ]! {$ S
- let w = getW(str, font0);
& `# P) S9 p# G1 K3 { C - g.drawString(str, ww / 2 - w / 2, 200);: h( K5 k: F* S0 d2 [+ h
- }
/ H$ [ B* `4 a! z: u' U t - * n* f5 L: F1 u9 Z6 K k0 c' @0 C
- const mat = new Matrices();
3 O0 @, a/ T6 ~" `7 N& Y; D - mat.translate(0, 0.5, 0);
. v$ C) b" ]! q$ h/ ?) {4 [
. P, ^6 f" D0 p; f$ \8 B- function create(ctx, state, entity) {) t+ C" B- I5 I; D- U1 L$ T
- let info = {
% E$ A' c3 k' v; N7 _. _ - ctx: ctx,
- i3 m7 g6 H8 T' d8 f9 B; x% w - isTrain: false,
9 q- a6 d/ z2 y8 t4 T; ` - matrices: [mat],# H" q7 i* Q" h! r
- texture: [400, 400],
( V }6 ^8 ^' U6 W" T - model: {
, s8 _' Q; V6 u r - renderType: "light", |& ~6 i9 s4 l+ {
- size: [1, 1],
- l4 r& k0 ~( a1 c - uvSize: [1, 1]
1 z& j: [& s. }& k) m, ^+ Y' D! P0 Q - }
f, s* m4 t. t - }
% _* P! F2 G1 {) p - let f = new Face(info);
; v: h/ o# ~ J: C - state.f = f;
3 F0 e% w$ P2 h3 f/ K$ R O) B
9 [2 ?6 c, D0 f8 f- let t = f.texture;/ F2 t; Z# x h$ s( y* L5 Q9 X
- let g = t.graphics;
) q4 D$ }3 p) C9 W - state.running = true;. L3 G2 c+ A% b k
- let fps = 24; K, K+ E$ Z! G
- da(g);//绘制底图
- O6 U% I/ l; O) d - t.upload();7 P4 e* \4 M3 G2 i/ t( v+ y- j& \. R
- let k = 0;4 h9 |/ A% W/ O1 S3 j* }! j
- let ti = Date.now();6 i9 ~! \( X6 M; D
- let rt = 0;
5 G/ i4 z7 r- a6 L - smooth = (k, v) => {// 平滑变化
& O- m6 A9 g/ L! B9 V0 A1 t7 V - if (v > k) return k;( |$ N# j. G" W' o7 S
- if (k < 0) return 0;
: Q+ g3 L; V+ |6 L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 E* l, R# X1 @* Z- D" Y1 s - } M n. p" N. q, b
- run = () => {// 新线程
( f9 |5 N: K3 y# z9 L* @ - let id = Thread.currentThread().getId();
$ |, t9 `. f+ k7 A* r# R: i& _/ N - print("Thread start:" + id);$ t! v$ i' X3 Y; @6 p
- while (state.running) {6 r9 ^9 ]. n, N4 p2 _9 ]
- try {/ y$ l! P- o- E$ z9 ~' i1 d
- k += (Date.now() - ti) / 1000 * 0.2;
3 I. H1 \# [, y: Z% Y - ti = Date.now();
# p. u. m6 f* D F - if (k > 1.5) {
% T. J! a# S! {* e8 w, i - k = 0;
9 |/ f3 G2 }9 i) }" o7 k' B1 m - }
, p z8 P7 a& F- H - setComp(g, 1);
/ D4 H( G5 G! v. v - da(g);
4 D% N8 c8 S% z: E9 a% k( r( d& f - let kk = smooth(1, k);//平滑切换透明度5 ^/ b Y. X/ S/ s
- setComp(g, kk);
4 G# Y- B ]- K9 B - db(g);) o1 K$ q9 ~( D( @0 x2 t& p# n6 g
- t.upload();6 V2 F! t& u& y: r& T& r# K
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 J5 o3 ?5 E' k+ j - ctx.setDebugInfo("k", k);
9 m+ b/ U& l2 H+ B - ctx.setDebugInfo("sm", kk);* k; X, G/ B, v, Y
- rt = Date.now() - ti;. u: p, G3 _& X5 N& u' k* C
- Thread.sleep(ck(rt - 1000 / fps));3 s/ p `) n( ~% f; j
- ctx.setDebugInfo("error", 0)
5 d. U! k" }+ d( u - } catch (e) {
9 ^2 T7 v6 o1 y7 E - ctx.setDebugInfo("error", e);! k" L: W' W. Y) @
- }5 n3 d3 ~) O8 L, y- h+ d5 v
- }
7 i1 Z9 [7 L/ C; t% P- E0 t - print("Thread end:" + id);
; U# |& F+ U5 ?6 n# b; C2 F - }
! r& E4 G% _3 v3 }+ W0 H - let th = new Thread(run, "qiehuan");4 f4 [/ T* L" P( \+ S4 X
- th.start();$ m, m2 B) b% I' a8 [; [7 @: {# q0 q
- }
5 e5 j/ t: e5 }% F* B; H1 t( S - 6 E& t8 Q7 g; s! f" d
- function render(ctx, state, entity) {
8 g2 d- _: y1 C8 _1 a: v - state.f.tick();
$ G8 S; M( b7 t9 q! i7 i - }
$ u' T$ Z1 Y: |( I4 i
4 B) s- ?/ ~9 M: U" l- function dispose(ctx, state, entity) {
+ l4 q0 e0 k8 W1 b' f6 v$ Z - print("Dispose");
: w1 N0 R# U8 B1 f1 } - state.running = false;8 |7 b7 b; y$ N: j# v
- state.f.close();3 R2 z& g9 z/ a
- }4 d- v+ l- |* p V" N" p
- 1 L* J2 A+ F8 ?
- function setComp(g, value) {
. J- W- J# d6 G, M* ~ - g.setComposite(AlphaComposite.SrcOver.derive(value));0 A! o# Z& [1 [. E9 L5 y6 `
- }
复制代码
/ h( `6 l2 C0 c' E& ` 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。- U& N! ? m& K
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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)+ x7 k3 W% |: b* V' @6 c; `
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