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# C, Z- j/ b) T6 E; Q3 O
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。
# p! L7 u: X8 i- importPackage (java.lang);
1 i; f1 e& {+ n; ~0 E - importPackage (java.awt);
& M. s" G7 Q& x& X S5 f. c - 1 n; H n: c1 |' ^* ~: o6 d
- include(Resources.id("mtrsteamloco:library/code/face.js"));- q2 z5 {0 O9 S
- 2 B$ w) l* E$ ]' n9 n3 U0 r
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 V# n9 n- ?9 ~- E5 q& E& {
6 U) n4 @6 L% J" U' X0 k2 |( `- function getW(str, font) {6 v/ l' o3 W) Q/ O
- let frc = Resources.getFontRenderContext();
9 E ?6 C' E" q/ U5 |& H) m - bounds = font.getStringBounds(str, frc);
; S1 C$ T- j4 A5 ?8 p: [ - return Math.ceil(bounds.getWidth());6 u* r- @% ?$ b8 ^' x
- }& a4 T$ I. z. A2 [& I# u. o# x
5 @3 l+ J' v7 ]1 p- {! \/ s- da = (g) => {//底图绘制* K2 `# W2 U8 y f
- g.setColor(Color.BLACK);9 R9 t7 W- X6 n3 C( t+ Q
- g.fillRect(0, 0, 400, 400);# M) d$ o, J2 J, {
- }+ i, o4 O3 G$ D7 g5 H2 k' ~
- * w, T8 H6 w$ d% |7 H' b$ f1 B, _# z
- db = (g) => {//上层绘制5 }3 ]8 O [3 C
- g.setColor(Color.WHITE);0 q- |0 h) d; {( K* u
- g.fillRect(0, 0, 400, 400);5 _7 j' h# I) @8 L9 j
- g.setColor(Color.RED);2 E$ `7 a8 Q" Y& \) T( P
- g.setFont(font0);
: P& d9 R' C; m0 R1 Y - let str = "晴纱是男娘";5 [) k) K4 g7 G6 ]8 {
- let ww = 400;
2 L0 P* u5 ?3 P - let w = getW(str, font0);
7 W9 m7 R4 s a+ t" w - g.drawString(str, ww / 2 - w / 2, 200);
9 _6 ?' D5 t, x. w" {( D9 L$ S - } Y& R- _' O( U, ]
, \) h( n# y) o: U! q* R- const mat = new Matrices();9 z3 B( B3 Q" m
- mat.translate(0, 0.5, 0);
; N; K9 R, W, G1 t9 | - * N& ~) L0 ]4 R/ c; ?
- function create(ctx, state, entity) {
' O Z# g$ G: k+ X" \- U - let info = {
2 N6 n+ Z# D( G% S6 A) a - ctx: ctx,3 I! K, @ Z: C8 [7 g5 ?' t, j; x
- isTrain: false,- h ~! U0 [8 _
- matrices: [mat],6 d1 L+ g, z- r; W
- texture: [400, 400],: E0 N0 _8 H$ o# u
- model: {5 E. u$ c% n; _7 A x) g5 t
- renderType: "light",
. i4 W/ P% |- y - size: [1, 1],5 Z7 A# U9 ~4 p: m1 R* M3 G9 v$ R
- uvSize: [1, 1]
& n& A3 B% Z+ C+ v9 N$ C' C - }
. @* h$ F, `; U4 J- ?! R% U) z - }
6 r' f8 i- w: h5 f - let f = new Face(info);0 x* b. n3 f7 o
- state.f = f;
2 l: @( }" f% Z* D; `% t) t - " G- U/ [( t- |. w
- let t = f.texture;
3 s3 u4 x- Q4 F2 K9 V5 T0 k2 m - let g = t.graphics;
" f# x) i( F6 j: v7 P- T - state.running = true;8 ?5 ?8 s1 z1 V; i1 B6 o
- let fps = 24;4 {" V# h; \+ U/ h# F! }4 ~
- da(g);//绘制底图/ v5 j( i! ?* s( `/ a: Q9 F9 @
- t.upload();6 \. Z( V2 J8 R
- let k = 0;5 ^0 L& L+ J5 V$ g% H9 N# l) [
- let ti = Date.now();
' k& |6 J8 Z) P. G& w# x) y o9 } - let rt = 0;( H8 Z) ^2 j1 a9 \3 b8 x
- smooth = (k, v) => {// 平滑变化. l) u: s- q3 W
- if (v > k) return k;
! z0 H+ t9 p2 D& S# H( J# c6 ~ - if (k < 0) return 0;) m& y9 x8 r) D5 @" R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- c( @8 b1 \% Q; w ~) b - }
; B' n( h- Y. S8 I' L - run = () => {// 新线程& z: O a% o& V+ U. ~ b: w S- P. H
- let id = Thread.currentThread().getId();
: a2 q# k( \& _' N8 P: \ - print("Thread start:" + id);
% T y8 T" ]/ l8 E0 w - while (state.running) {
. \0 C9 p2 X" d1 j9 i/ d! S' g+ p - try {
: t6 u. i J. f# } - k += (Date.now() - ti) / 1000 * 0.2;
7 V1 w E \1 d N0 K4 R3 _ - ti = Date.now();
% w V6 N+ Q0 Y7 b- C2 P8 d - if (k > 1.5) {
7 w; j& g$ ]5 f% s, I U# J - k = 0;
! r2 u! `9 b5 Q: Z8 I - }% K' L8 t- u, t. z
- setComp(g, 1);
6 q- s) o( U% k0 W - da(g);
7 _& J+ ]* T. t - let kk = smooth(1, k);//平滑切换透明度
% m( C6 L+ |/ o$ I4 p% z - setComp(g, kk);
1 k3 o( ?1 E, q% E - db(g);4 ]& q' b, X- y# l5 d+ b3 \
- t.upload();5 E; W# R I2 k% o0 X& |' E
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) P! J$ A3 V, g2 f - ctx.setDebugInfo("k", k);8 P8 ]3 I1 w3 Z. F4 ^$ b2 R
- ctx.setDebugInfo("sm", kk);
" r( j3 h9 A& `7 N1 [ - rt = Date.now() - ti;& Q+ I1 ^2 a' k' Z* W' e
- Thread.sleep(ck(rt - 1000 / fps));' Z+ h2 a! w [ `
- ctx.setDebugInfo("error", 0)
3 [0 e& d, y2 L7 Z6 B - } catch (e) {3 v0 k7 q# y8 M7 F
- ctx.setDebugInfo("error", e);0 p7 i5 L3 H* k. U4 U- f2 v
- }
^9 f/ Y8 Z: I4 i7 c - }0 l% G. K( J1 ^, f% S% I8 ]7 @
- print("Thread end:" + id);( M1 B1 Q; j$ q8 B; _% y
- }. g$ b3 d' Y; j* @# ^
- let th = new Thread(run, "qiehuan");
3 J' z% R( ]2 J9 d% R) l+ m4 U8 }% h0 s/ w - th.start();
9 ?3 h: A* w- s0 r - }; M4 O( [ y2 m
- # ~" N, C$ Q1 x- X. @. d) L+ K
- function render(ctx, state, entity) {' b- p9 j# U) P9 j
- state.f.tick();
( X: I- X* s7 X1 Z6 ?" E! l* b$ _ - }
% M) k, L" }1 e
; x- \0 T( B$ M- function dispose(ctx, state, entity) {, a( S- x) @: k+ [
- print("Dispose");
% @! b8 _% x7 d5 p& S0 _5 g - state.running = false;
2 p% W9 }8 ~( P1 Z - state.f.close();
. {/ _, t" K- T& U" T" ? - }3 c6 E! l. a L
/ ?- _6 v6 f1 a, e- u* n( }- function setComp(g, value) { Z' }$ \! R4 \; H2 b- _
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ |8 w$ n2 Z3 I4 b: F, c0 U0 r6 g
- }
复制代码
, j8 ]. A. `4 d; o) f0 U& \+ H! W D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。
# g- E8 k( p1 G) X! R
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4 K$ p: {; K( q9 {/ `8 t- ] 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)& E8 e6 ]- r; l' T) F
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