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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。 C% |$ y4 p v" r4 v1 l
- importPackage (java.lang);
0 b. a" l; y3 \7 S* T0 ] - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));; h/ G$ A3 U6 z% x# Q4 H* B: G
- ! u& w" m8 l4 p# A. b$ V. D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. q) p" e1 \; N) q
- 0 a( ^$ S; ^; F' T* t
- function getW(str, font) {
* F7 F1 T4 G, Q, }. v* n9 W - let frc = Resources.getFontRenderContext();
2 o" `4 c, {4 Q: n, o3 N4 Z - bounds = font.getStringBounds(str, frc);! K- S9 O( S) x4 R" j0 ~$ ]
- return Math.ceil(bounds.getWidth());
4 `$ d/ J% }$ q7 c - } h; w! f; i- m$ G. N
- : Y* V/ [9 X5 S) h& W4 i6 H
- da = (g) => {//底图绘制$ g4 D4 i4 a( p& W, A$ Z/ ^
- g.setColor(Color.BLACK);
_2 O! k; t. n9 W ? t - g.fillRect(0, 0, 400, 400);- ^4 o# j {8 S; S
- } E& \. n# Q* ?9 ]* j
; ^; G0 J+ ]' q: |( s/ l- db = (g) => {//上层绘制3 v" w. W! [) y9 k, [4 Y! b$ @
- g.setColor(Color.WHITE);
c' g. I9 o9 h& j - g.fillRect(0, 0, 400, 400);1 }9 g! `7 r Y2 s% [
- g.setColor(Color.RED);
( Y2 K1 L3 A& w7 Q - g.setFont(font0);
; U0 C7 {1 T9 o. r6 X6 s - let str = "晴纱是男娘";
6 N5 E. U. @% k - let ww = 400;% w, }& D. ^- Y8 [/ X& E% ?
- let w = getW(str, font0);
7 i. W6 k9 u. } - g.drawString(str, ww / 2 - w / 2, 200);. D& O0 [( x. ^$ S
- }8 \8 w0 x$ O% C
- 2 B) Q8 M$ {9 Z: y7 K+ `6 l
- const mat = new Matrices();
2 d1 z) R! H) O - mat.translate(0, 0.5, 0);
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: a S- F, I& w/ c8 r- k. H' v- function create(ctx, state, entity) {1 N- i/ b8 m! `% B2 o2 q
- let info = {
* B, m6 R5 m" z) \, i - ctx: ctx,
4 t6 y- M3 `2 n3 o8 U) ]3 @2 z - isTrain: false,0 X/ W$ w1 Y3 W* u4 H
- matrices: [mat],
6 ^2 b; X `9 D$ D5 ^" P" n - texture: [400, 400],* C; t7 E, W% f$ T, t
- model: {
& B/ M8 Z) W6 u1 Z# ?5 H3 D) o - renderType: "light",4 ]' V( G9 K: k! l8 b: K
- size: [1, 1],
3 r! N$ f' Q9 x2 j! g1 ~* s - uvSize: [1, 1]
* e4 T& m- p( c* r( i/ r9 T3 H - }
6 }1 z. v- l0 R% T2 t3 f# o7 L3 V$ B - }4 B: g$ o8 h7 c! C# u. @+ Z }4 O
- let f = new Face(info);
0 l: }9 o& G. b+ z, v - state.f = f;! S; T/ j7 d4 e: i% a* [; r
! f2 ~% ]# }1 @( n. K4 g l! _- let t = f.texture;& R& [+ G1 E# F2 D: B1 V; s
- let g = t.graphics;
' w' {3 F, M" X9 \. V8 I6 }/ V - state.running = true;+ H1 ], `- T) B# U' l% R" T, o
- let fps = 24;* A7 j, q: r @
- da(g);//绘制底图7 a! E' A$ n4 i. a# h1 Q
- t.upload();
6 q1 l! n4 F) L; j - let k = 0;
6 Q$ p# n8 q% ?0 r6 v - let ti = Date.now();
' p- y; M, @ d - let rt = 0;
9 h) ~ V) m0 B& [2 ]8 o' p - smooth = (k, v) => {// 平滑变化
3 _; A. I/ A; d9 V% j$ p0 y4 ]% { - if (v > k) return k;
3 j3 B& }9 P" j! u7 h - if (k < 0) return 0;
6 H6 z$ K) Y3 J4 Q% q2 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* Z% ? d+ s6 I; _/ w4 A7 w - }
4 W1 B3 j8 L1 \; c8 P2 D - run = () => {// 新线程
7 r5 r: r" t8 d - let id = Thread.currentThread().getId();
5 k( P- u! s, i4 ]4 W - print("Thread start:" + id);3 }/ `$ d9 o* `# h$ V
- while (state.running) {
8 o' i! N/ Z% k) g - try {5 R' h$ D( P; U' i" y
- k += (Date.now() - ti) / 1000 * 0.2;
3 V' d# B8 I! H& c: e7 @3 c - ti = Date.now();, \) Y+ f0 r; C5 L1 m6 P; X" `
- if (k > 1.5) {4 k$ Y0 T1 V' e' `. M9 k) }2 E
- k = 0;3 X5 d9 A3 L& c( {+ G% G) E' A
- }
+ v1 c+ l4 O* m4 D6 X+ R - setComp(g, 1);
5 f- `+ M4 V! L8 q) Q - da(g);
& c8 q6 ^; M# q7 Y9 G! J - let kk = smooth(1, k);//平滑切换透明度' ]7 K6 R5 T, U! w2 g! I9 T l1 o Z
- setComp(g, kk);
. q. s8 F9 @# s' w9 u! _ - db(g);2 s% k* D5 a( @
- t.upload();
0 c* p: R/ u2 @2 l* b# ^; l1 B - ctx.setDebugInfo("rt" ,Date.now() - ti);
, q5 z, a4 D3 J6 \6 y' Y - ctx.setDebugInfo("k", k);+ `7 q) y6 W6 e k' h
- ctx.setDebugInfo("sm", kk);
7 m; j3 f+ d! w9 C" d* L - rt = Date.now() - ti;
& p$ I O0 o, X& { N4 q3 n4 r: ]0 X; O - Thread.sleep(ck(rt - 1000 / fps));4 g, Q0 ~: p: l H! f5 R
- ctx.setDebugInfo("error", 0)
- }, p' h2 d: v: C3 n9 i0 s) E - } catch (e) {
. |2 a4 E7 z9 Z/ X; ?, v - ctx.setDebugInfo("error", e);* @9 X/ ^" T. I2 ?% `
- }
1 o5 \. R& G& Z2 \$ S! n- a: Y - }
2 W$ v$ N) F+ v - print("Thread end:" + id);0 ]& S! x! o( i* l) O' u$ m: u: p/ c8 N0 y
- }( C7 k6 E9 ^2 E( F
- let th = new Thread(run, "qiehuan");
4 T1 U1 w- [& B! K: L9 n, b - th.start();
8 N% A4 n' H5 Q9 z0 K - }
' F! a( H1 y" [, s& }7 X7 x
" W( d1 W) u. N b/ ^- function render(ctx, state, entity) {
+ `- r& q3 `3 r0 D& d - state.f.tick();
' q" {! `4 ?1 \- j) l - }& U2 O' A2 W! A* w% y# ^5 a$ ~ N
3 Q/ z/ A7 |$ Q) b& b- function dispose(ctx, state, entity) {
& Q4 f1 K+ J5 \0 Q - print("Dispose");
1 [. J) H0 C+ D9 Y ~6 A - state.running = false;
- i# O9 {4 X5 X; F, H! K( ~# t - state.f.close();0 j, z: `( z( ^$ B
- }5 k2 s# E3 |, P! x& A
- / ]8 ^* z# v! O6 y
- function setComp(g, value) {
! O8 C# [' {- d2 W6 z - g.setComposite(AlphaComposite.SrcOver.derive(value));$ m0 u4 q( G/ }9 C1 L
- }
复制代码 7 ~) K1 p M" i9 h0 z k8 A
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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2 _9 U+ N4 u6 R- e, `4 t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- \- Q3 [( P6 X4 v2 G0 U
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