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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。7 g7 `9 ?# A# [0 `. u* _4 n
- importPackage (java.lang);
. X1 r1 T; M/ i/ V& U! R7 f - importPackage (java.awt);' f8 H- i4 P. ]1 d0 V5 A0 H8 l& i. Y5 R
2 [4 ^4 g3 f' {& d0 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) {
9 M$ T3 u2 @4 I% \ - let frc = Resources.getFontRenderContext();
8 Z. A& ]/ s6 n' { - bounds = font.getStringBounds(str, frc);
1 z) ]( A) D- f. l, n. ^ - return Math.ceil(bounds.getWidth());
) i; _/ R2 a- y5 I' R - }
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- da = (g) => {//底图绘制" P% T5 w% J8 N+ {2 E% t0 M6 N
- g.setColor(Color.BLACK);
7 P% x. r1 [- [; ` \ - g.fillRect(0, 0, 400, 400);! A2 i$ q* I ^5 _
- }
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% |: D) {" _7 l; j$ g# G+ M- db = (g) => {//上层绘制
/ @$ [7 \+ h5 x - g.setColor(Color.WHITE);
3 c# ?. L: e1 X% J5 i - g.fillRect(0, 0, 400, 400);& L+ N# m, I; M; K# E% T9 K8 Z/ W
- g.setColor(Color.RED);
: r! ~4 @ S N7 g. x) X w/ T3 u" h - g.setFont(font0);
* [1 Y) l6 G; G) V9 S - let str = "晴纱是男娘";
$ P- a6 s) ^# Z - let ww = 400;1 e; i q' R1 f/ V, Z- {5 R
- let w = getW(str, font0);
5 S; {* D5 e* _ - g.drawString(str, ww / 2 - w / 2, 200);" A' g7 a: D/ Q& U7 I2 V
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- const mat = new Matrices();& R" g+ t8 R' G1 h# ]
- mat.translate(0, 0.5, 0);
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9 M% f7 T0 k, G- function create(ctx, state, entity) {8 H' z) x, }$ t( K( Y: i
- let info = {
1 M6 t- d% m+ v, K5 T* n - ctx: ctx,# B) ]2 Z$ d5 w' s! h: M$ g
- isTrain: false,
& y' d8 b- m- a8 w8 L - matrices: [mat],
, @2 R1 G. C& h& u1 O( y - texture: [400, 400],
. _4 s- n3 c" @ - model: {$ \" W7 ^/ C/ u# z) q' X& T7 m
- renderType: "light",. R; r1 W5 v8 r% m
- size: [1, 1],
9 J& w/ ~+ H1 ` - uvSize: [1, 1], u. p3 e6 f9 N) F& a* q
- }
! K+ e- D# r( v; _' Z* \ - }
! _( Z) G) F6 m `1 r+ f - let f = new Face(info);/ n0 R9 t$ a2 N! s3 [
- state.f = f;8 d7 e L1 P! `
- / Q8 P1 ~3 u3 A m7 f( [+ p6 e& ^
- let t = f.texture;! M8 V! K0 u5 [2 S
- let g = t.graphics;5 u; F9 A; [$ M2 K( o
- state.running = true;
( a8 G7 m' f& Y$ G) s - let fps = 24;
h' ?$ u" \9 Q% J( P* [ - da(g);//绘制底图1 ` I* M# ~4 i; E0 j# ?- w7 D
- t.upload();* w3 Y( G. [* I3 A7 C+ I' A* f& ]
- let k = 0;0 B+ [; _6 V5 x4 X. u. I- z
- let ti = Date.now();
) P4 j, H* V. |/ q3 y - let rt = 0;! J+ u5 n4 N% y
- smooth = (k, v) => {// 平滑变化: ]# Y3 ?' Z4 C. J4 x) G
- if (v > k) return k;' U0 W$ }/ h/ V6 q
- if (k < 0) return 0;$ `4 C) e7 r$ a4 d+ }! ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 {2 H5 Z/ V( k) C
- }7 `3 G0 i6 b8 C5 V9 K
- run = () => {// 新线程
+ A( A: W- ^. u% N( ~; T6 l, G - let id = Thread.currentThread().getId();
! O* z9 }1 r& K) h* b, e - print("Thread start:" + id);
+ v. q% j4 {% B* x' m T1 _ - while (state.running) {9 S) D ^( \" [* X6 n- D
- try {
' v2 M) B X* @8 ] - k += (Date.now() - ti) / 1000 * 0.2;
* d: P0 L8 S/ ` U - ti = Date.now();
8 D6 Y# y4 G) g- |2 g# W - if (k > 1.5) {! M, O. N& V6 E/ e
- k = 0;9 Q2 B4 n+ `2 f, M
- }
# n2 M& Y" T; { - setComp(g, 1);
0 d0 w7 A( L: w- X; m9 @ - da(g);$ e7 p9 Y: n2 D* D" F; y7 F
- let kk = smooth(1, k);//平滑切换透明度
\- w+ ]) R' } - setComp(g, kk);2 S+ g' }, y' k
- db(g);
6 F& \1 A6 @4 L# G- B! h0 c - t.upload();
: {9 S+ o N$ X6 ]1 @; R1 u e - ctx.setDebugInfo("rt" ,Date.now() - ti);( x& z) L) k3 l
- ctx.setDebugInfo("k", k);
. e, b9 F. T# f8 l# _ - ctx.setDebugInfo("sm", kk);# Y: y$ g7 g9 \1 N8 ~# C
- rt = Date.now() - ti;/ k5 c) h$ A5 K0 l) \& C
- Thread.sleep(ck(rt - 1000 / fps));) ^; w8 @: ~. r: F
- ctx.setDebugInfo("error", 0)
; j' K! W0 e7 v, [; V. |7 e: P - } catch (e) {0 T% @: G5 ?) k0 x' W s
- ctx.setDebugInfo("error", e);
, C. o- _; W: J! r* n/ w# B0 r1 c+ m. w - }
- {, \3 x. n% V - }' h+ b1 n% D% y5 a) }
- print("Thread end:" + id);6 J, Z# V* [ c" o9 O/ J3 S
- }
: j( M7 x; Y" b1 `% z - let th = new Thread(run, "qiehuan");" g2 X7 W5 ]; o" q5 r
- th.start();
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- ! {1 X) Z) s3 q
- function render(ctx, state, entity) {
0 L4 Y( q: m0 Q - state.f.tick();
) i4 s5 e: P* t+ h' c. O/ i - }
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- function dispose(ctx, state, entity) {
4 j/ i$ O% J6 s8 s" d! V - print("Dispose");5 B6 ~5 y6 o' z# O' K9 E
- state.running = false;
6 C; F4 Z" _0 ~" o - state.f.close();
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) ]2 S j0 x3 T( j2 o, H- function setComp(g, value) {
7 C u% V# v; B - g.setComposite(AlphaComposite.SrcOver.derive(value));
. l5 v3 Q# u4 m2 }: v - }
复制代码
4 o' D/ O- d$ w, p1 f" |3 k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)+ t2 }* G5 F4 b0 L C& {
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