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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。" G6 T& j: m1 F2 n: T& ]$ O
- importPackage (java.lang);/ ~. W& @7 K% y) Y3 A& z/ o
- importPackage (java.awt);
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5 s& [7 d1 O4 L" o7 [5 p- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 B) ? ^" t( V8 x3 \- [$ {- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ w7 ~* P( \' ~. f- function getW(str, font) {
, ~9 r( B& J5 S& t - let frc = Resources.getFontRenderContext();
# |. S- `2 x' n& q! J0 _& V - bounds = font.getStringBounds(str, frc);
, l, b f6 {7 n% o4 I p T% I: C - return Math.ceil(bounds.getWidth());: n# F. g; M9 {) |
- }
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- da = (g) => {//底图绘制% m; X2 g8 ?, U7 k0 y
- g.setColor(Color.BLACK);4 l3 e# U! x" e. \4 \$ p" W
- g.fillRect(0, 0, 400, 400);8 z/ O! _/ ]: K
- }: V1 C0 c: H _/ U5 m3 i( p
" A9 U |8 k3 M4 \/ ^- db = (g) => {//上层绘制
7 b& ~* Q" @6 z8 P - g.setColor(Color.WHITE);1 q* `0 M+ p- `4 x) }& J4 Z% t
- g.fillRect(0, 0, 400, 400);' v1 b T: Z( D. g! H+ d
- g.setColor(Color.RED);& R% O+ h! ?% s2 L1 p
- g.setFont(font0);
+ C: F* ^& D0 f0 _ @ - let str = "晴纱是男娘";
- \' K0 c; l1 d# P' M( F - let ww = 400;" t p/ ^+ V: p
- let w = getW(str, font0);( I; X6 L- V7 k$ u' N
- g.drawString(str, ww / 2 - w / 2, 200);" D. K8 \, z9 L0 o( i6 ?
- }" x7 ?: ]* r) T: p5 _1 A; s; o# n
* R5 B( N% A. L4 y8 |0 `2 Y0 F; Y- const mat = new Matrices();9 F1 T$ h/ O1 |3 Y* F& G
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {! D/ I* b. a3 l+ H& m& u% S
- let info = {* D4 ~0 M' D9 Y, D9 `( v, _, L! I
- ctx: ctx,$ ~6 e% T" t. @
- isTrain: false,
) q! u" B G: ]9 o/ P! @, L: r* n/ c - matrices: [mat],
o4 C: i" o2 U5 Z - texture: [400, 400],0 J0 I7 @* H. A- \
- model: {
+ e8 j9 H/ a7 N - renderType: "light",
6 R4 T- i/ d2 W* [8 J( w - size: [1, 1],
' {2 a; m! L: J) Z' @; M - uvSize: [1, 1]
# g- I7 d- W# ~5 p# v1 m& J8 \ - }
# I$ \- S- P( e1 Q - }2 V0 ~' s1 } f
- let f = new Face(info);: b( y& Q& g& h
- state.f = f;
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- let t = f.texture;5 @3 Q5 h$ v u: x! n
- let g = t.graphics;
o7 Y* A: [2 H: q- B! _$ Z - state.running = true;
/ q+ ]$ n- a1 {4 H( l% K9 n - let fps = 24; I/ }) r$ o, g/ |1 f
- da(g);//绘制底图
4 K _# K0 G2 v; Y - t.upload();
+ Z, N% k0 I7 H# q" L/ ? - let k = 0;
4 [0 f7 p' a! ` - let ti = Date.now();6 j. O z$ f" V4 K
- let rt = 0;
6 Y8 X2 ^* N% D @: X7 i - smooth = (k, v) => {// 平滑变化5 ]0 b, d: N1 U/ Z
- if (v > k) return k;
0 H8 [2 s+ Y+ F5 W M - if (k < 0) return 0;
6 O+ b$ N/ r4 |: i. [$ @ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
' _% V( O7 ?3 R @/ N' U8 K- L - let id = Thread.currentThread().getId();! p# E a i) ]. y0 z
- print("Thread start:" + id);+ N* {/ C& D% Y
- while (state.running) {5 J% ?! O4 t7 ]4 L4 c
- try {
3 K9 b7 W' F# i - k += (Date.now() - ti) / 1000 * 0.2;+ d2 {4 y* N- W* R% j T; z4 _ ]
- ti = Date.now();
9 l7 Q6 |; U2 V5 \% N - if (k > 1.5) {
c2 J3 d" Y$ T* U' H/ y+ [" n; i - k = 0;
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- setComp(g, 1);
" R0 R9 T# d- A1 | - da(g);* H: I0 [5 R, @$ A5 |. u
- let kk = smooth(1, k);//平滑切换透明度- ^8 A$ M" [" O; ^( q, T
- setComp(g, kk);
6 n1 r4 R+ O; Q; _# |. C - db(g);
# j8 k) t. Z: w5 T1 m - t.upload();
2 Z* m) u/ `; X1 G* v- F4 K' \! | - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 i5 f" }: K" w- u u& e - ctx.setDebugInfo("k", k);6 I: ^5 B' E/ i! H& Y. w6 K7 C
- ctx.setDebugInfo("sm", kk);+ M2 B% z. E8 K" C: s
- rt = Date.now() - ti;
: Y7 S: B: L4 {% O - Thread.sleep(ck(rt - 1000 / fps));( ?% Y( U" c3 `4 [, J! N
- ctx.setDebugInfo("error", 0): I# E# _- u" @3 r
- } catch (e) {
9 W' l3 x l2 ^; Z4 ]* J - ctx.setDebugInfo("error", e);7 a8 F. P, }! _- f2 f
- }, R7 i1 a' N4 v( O5 x
- }
; j$ I: N- J! \( d* w; E2 G- W. A - print("Thread end:" + id);" k" d2 `" a6 J" e
- }
9 f2 ~* h' }- p - let th = new Thread(run, "qiehuan");
# U; w" `" d2 ]5 O! t - th.start();
* L" h" _2 S! @8 S - }
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3 @0 S9 j4 Q. y- k) \# b- function render(ctx, state, entity) {
3 Y% u8 Y, R6 G' E: a - state.f.tick();
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- / Z* J8 K3 N4 `+ {! F
- function dispose(ctx, state, entity) {
% B. V7 M! D7 [1 a. o2 c - print("Dispose");
, y) T* W% O. [: `& U' G0 E - state.running = false;
- D5 v2 I2 j0 Q" o2 d- h1 v& U - state.f.close();% E; x, c0 q: Y7 P6 A: G! ~
- }
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* a& N' ?0 G/ T3 y- function setComp(g, value) {
. Z2 {: _; Y( V0 y; @ - g.setComposite(AlphaComposite.SrcOver.derive(value));/ F8 Q9 a @/ J4 ]+ e1 \$ n
- }
复制代码
2 C# x# A* i H7 S! I2 z& Y4 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。
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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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