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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。
; O x8 b4 n Z. ^( f- importPackage (java.lang);
6 @' |3 S3 Y/ g$ i - importPackage (java.awt);
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4 J: X% I& g; t, G2 B" i. a1 F- include(Resources.id("mtrsteamloco:library/code/face.js"));
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8 u! v/ O- m" @4 i( k' E% p8 b' ~- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# `0 ^6 t4 P4 ?9 l/ ?, y- D
: s4 w+ Q+ a( x/ A- function getW(str, font) {0 P) N% E( R7 O# m& n# ]* k( {
- let frc = Resources.getFontRenderContext();/ k3 U0 F" c& i1 o F
- bounds = font.getStringBounds(str, frc);
! y) n2 s3 R3 c4 W( D5 ` - return Math.ceil(bounds.getWidth());( ^% I/ t4 |! }
- }
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- da = (g) => {//底图绘制" P; E/ ^8 _* W7 q: D }5 U
- g.setColor(Color.BLACK);
8 o! p; N6 }- n. y. g - g.fillRect(0, 0, 400, 400);: s) j3 [; x. V# o& D- h% \
- }
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8 D6 H( K. K/ D- db = (g) => {//上层绘制) ^* M- s1 k. k! A
- g.setColor(Color.WHITE);$ Z' W; i7 M# b4 o
- g.fillRect(0, 0, 400, 400);! h% r/ ^! y( K1 B& S& t
- g.setColor(Color.RED);
2 p* r# A/ h3 y( d7 _) o4 k - g.setFont(font0);
/ [7 r" Q" @' u - let str = "晴纱是男娘";1 A* H, {% o3 J# Z! f) {
- let ww = 400;
0 e% C+ T# M* K1 h# _% n8 k - let w = getW(str, font0);" C3 y- X {% S% U' }. M* u
- g.drawString(str, ww / 2 - w / 2, 200);2 k0 C. b* U0 G1 S
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, P/ s# v+ D" x" o8 F) B- const mat = new Matrices();
4 D- a' o# C' m8 O: n& Q8 o - mat.translate(0, 0.5, 0);
- r9 Y5 c5 Y7 z9 p7 ?- a
" _. n. N) H$ A" H- function create(ctx, state, entity) {
- |8 y- Z0 i, ^, D - let info = { y# s# z, a! r' @
- ctx: ctx,: N5 F! O7 S" v5 a
- isTrain: false,
- ]3 W {+ F9 Y1 h0 ]( G/ U - matrices: [mat],
2 c/ G1 B6 m: m; S: P. R( b$ P - texture: [400, 400],
) M* X% S; {# M - model: {$ n( \6 C3 t' g4 s) l* i1 z
- renderType: "light",
" T9 g! ]% ~" Q( ^+ |2 F - size: [1, 1],
5 ?2 V. W" ]" `, R$ e7 {/ C - uvSize: [1, 1]
! C' p$ }8 e+ l) L9 U$ A - }
8 \% M; _' }8 j - }
+ E' j2 P/ U5 |: u7 s$ p) ~) }' A - let f = new Face(info);. Z: U% F1 Q% }7 Z, @7 ^
- state.f = f;6 |0 p7 g2 L( D' [6 e1 A3 D
9 S+ E: t S! E6 [- let t = f.texture;, c; P- L1 { b( Z4 F- t2 W
- let g = t.graphics;
+ O: u, n0 N! u6 h; \2 x% V - state.running = true;
' Z n( |/ Y# v9 [0 k8 Q1 T - let fps = 24;+ m1 S8 a/ `, f$ ]# O& M
- da(g);//绘制底图
/ I9 d- @6 l0 J' E - t.upload();# z2 J2 ]) y, m. _
- let k = 0;
, f" X5 [) s3 [5 ^; n# k - let ti = Date.now();
+ {" S1 n7 O8 }4 O; B# _ - let rt = 0;
4 Y/ f4 _# |5 d% |6 r* { - smooth = (k, v) => {// 平滑变化! ^8 ?% p j" V/ y( f
- if (v > k) return k;9 M( F0 i5 r2 a/ L1 w
- if (k < 0) return 0;; t5 J- ?* i; _* c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; [) A- F2 E9 E: H3 s
- }* I' c$ W& M' K3 f9 k% c
- run = () => {// 新线程
2 S- d9 d1 ]- q7 S% \ p Y - let id = Thread.currentThread().getId();
# c% t; a6 G. d, `) {' i - print("Thread start:" + id);
P% z+ k& X. Z - while (state.running) {
2 z e% C& {5 V - try {
3 Q$ H# W8 T* f3 C3 ] - k += (Date.now() - ti) / 1000 * 0.2;
8 ^5 d/ [4 v4 n - ti = Date.now();
; N8 [$ t+ u. `" I& P' m - if (k > 1.5) {
! r3 Y# h7 U7 O' ^ - k = 0;
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- setComp(g, 1);
. m* x3 h% z- w1 ~* }- n - da(g);
6 L, ?! I5 j! B8 l' j - let kk = smooth(1, k);//平滑切换透明度# E6 Y( b+ T) f' }
- setComp(g, kk);
7 a% p$ `- I$ V2 e# b2 V5 ]# q! \ - db(g);5 N- L9 V7 T9 C9 j8 U0 r
- t.upload();, F5 x7 T0 H- x0 j1 v" x3 O
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 S# ~, n% m O2 M* R7 Y+ C' v
- ctx.setDebugInfo("k", k); `, ~2 f% C9 m; [
- ctx.setDebugInfo("sm", kk);. w8 d6 E \9 \+ K( Z+ n2 A
- rt = Date.now() - ti;
+ P1 s: X' q* _ - Thread.sleep(ck(rt - 1000 / fps));# C5 t/ O& ]5 H! k
- ctx.setDebugInfo("error", 0)+ i) @/ N' v2 a) q! ^5 }
- } catch (e) {
+ S+ l: L& O A- m v7 d - ctx.setDebugInfo("error", e);5 U! }5 t8 p" z; W
- }
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- print("Thread end:" + id);' b0 Q# W" l7 s* X; u; @
- }2 y- A' s6 H2 s) f8 H8 B/ B
- let th = new Thread(run, "qiehuan");, p- Z0 ?9 \$ l+ g9 p5 |$ u
- th.start();
) b8 c1 {+ V n, ^! O# y* L. A - }
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% J! C/ L7 ]0 ]& H j1 }: x- function render(ctx, state, entity) {
& S! i/ W7 h3 E, _3 J2 e5 j0 D; { - state.f.tick();
]) F" b4 }: n, z - }
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- function dispose(ctx, state, entity) {
* q& v; f9 N8 W8 r1 t9 z3 q - print("Dispose");) x# H( B$ B, M4 p3 J% l1 f' Q. M
- state.running = false;0 x) G; d. L0 g. C% ~/ i h
- state.f.close();& c. a A& d6 `5 U! v* y
- }4 Z, W3 K6 l6 w/ R$ y- z) ^2 c
( P- W. ?. s- n) ^; x- function setComp(g, value) {
0 i& S" B- q7 R+ X6 l+ h - g.setComposite(AlphaComposite.SrcOver.derive(value));" s( j3 A) [$ q' M" @# x& i! V
- }
复制代码
: L$ }6 n' c# G" p& [% U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)
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