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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。
' Q; u& r& S+ x0 D0 {: z- importPackage (java.lang);
1 }8 \" h3 t# I7 N' P/ \ @ - importPackage (java.awt);
. e; ]7 k$ `7 C( U - 2 Y) \1 N. s) T7 N3 W8 [
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 {7 h8 A" ]9 p0 `+ r
4 u* v! k3 Z. h! ?8 Z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" X% Q4 r0 T2 y7 V! j
- # F- M+ |) K7 o. f
- function getW(str, font) {1 w5 R( U" \2 [- g& E5 i
- let frc = Resources.getFontRenderContext();1 j" y" S H: z) E) K$ G3 Q& C; ]
- bounds = font.getStringBounds(str, frc);- e! }% ]& f7 E3 z [! n
- return Math.ceil(bounds.getWidth());
$ j6 r" B; Q+ ?; M: T T3 [ - }: C8 p& A" a; i$ L& S! i
- ! P, E+ v9 P& W( K1 ^: z
- da = (g) => {//底图绘制, D6 {9 _/ M% G& I/ r1 v
- g.setColor(Color.BLACK);
% s7 L, C# |, u9 _5 j/ G - g.fillRect(0, 0, 400, 400);( d: Z4 W( T( D: u' W& D, N
- }
_- Z& W; S" i, O' z# X, b4 ~ - + z# Y9 h& i$ L. @: L
- db = (g) => {//上层绘制
2 K! O+ [4 i v! x# _ - g.setColor(Color.WHITE);
# ^, p% H* H7 p7 z% y$ i) Z; a - g.fillRect(0, 0, 400, 400);
, B8 G& e; \2 x - g.setColor(Color.RED);
! x, {$ {" O( j& }& P - g.setFont(font0);
, G7 M7 U" g9 l& \, f' Y - let str = "晴纱是男娘"; ?; ~' @( u( |4 c9 k1 F3 R
- let ww = 400;
% t- z3 B- R; M o - let w = getW(str, font0);
, @( C3 r& N$ j Q$ `* { - g.drawString(str, ww / 2 - w / 2, 200);6 q, v) w3 m6 t: |
- }4 ^" Z/ T' O2 V" y8 F* ]% B/ l
- " ~3 l) S% p0 D( T! Z
- const mat = new Matrices();
}9 g5 I0 K3 k% U. ^! \/ J6 j - mat.translate(0, 0.5, 0);
6 s( |# Z5 w% M
5 Z: @3 Y8 O7 ]/ z o$ n! ~- function create(ctx, state, entity) {: k8 E& D5 T' T: u1 A
- let info = {0 B/ H$ r! I+ u/ U5 {
- ctx: ctx,
8 H z8 x' M1 b1 g9 \ - isTrain: false,
- Y7 I! \( A% f9 Y- M1 C" W# ^ o$ D - matrices: [mat],
4 o* C" V* W' B- N - texture: [400, 400],! E- U+ i7 C# A' R( x0 [: o& h
- model: {
' U' D' H+ V- D' l - renderType: "light",
5 w8 w# q4 B& W, s- i' W - size: [1, 1],
0 G) }. y+ m' `: X$ {( p) r - uvSize: [1, 1]
- y* W! x2 ? w; u* K# l7 ? c: X: { - }
6 q8 K: B. @* ~9 h - }2 y% l5 x: P1 ?3 Q
- let f = new Face(info);
1 l( u6 a. l6 | - state.f = f;6 L" M7 }% M* W5 T3 J. h+ n
- 1 S) y9 L4 I" v' a
- let t = f.texture;
( I5 L* j) W, u% ] - let g = t.graphics;
+ w' [/ I$ I7 t; O - state.running = true;
/ T1 R9 h; X- @% o - let fps = 24;
- \4 g9 q5 }; j/ }( o3 E0 Y0 T - da(g);//绘制底图
+ i4 G1 x0 p! a b5 b - t.upload();1 q' f, X+ p" q) e
- let k = 0;' S5 A; L1 b; ]
- let ti = Date.now();
3 c3 q0 H, @; V5 N: l - let rt = 0;) T- x9 }5 z: P3 M
- smooth = (k, v) => {// 平滑变化
4 i7 Q+ C& P1 x- V4 L; D! | - if (v > k) return k;
1 \/ P8 f0 I# P7 K' O) g* k - if (k < 0) return 0;
* X, U* z; g$ Y* ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ l% m+ |3 U j t) z - }+ a7 r* z: G6 f' m) S7 \" u# u
- run = () => {// 新线程
! }! Z# N4 S1 q, P2 h3 Q/ I& ` - let id = Thread.currentThread().getId();- t9 S; z0 X3 w( O2 }8 V) x+ I
- print("Thread start:" + id);
4 E$ ]5 V7 L' }6 t8 q2 j2 W - while (state.running) {3 u" ~9 S& l+ g6 G! Q* q7 \
- try {$ C7 ?% r5 I, t$ h) {1 p
- k += (Date.now() - ti) / 1000 * 0.2;: j( R& C9 D* e. M$ v% n
- ti = Date.now();$ e8 J: L* d$ g: R5 R( z
- if (k > 1.5) {, v0 E$ F# H; k5 D7 T8 q8 V
- k = 0;
- b! P1 S# E; k1 c* J0 y4 d: a - }
# y, i* b2 x9 S5 X - setComp(g, 1);8 i( x( v1 z* K2 v4 X
- da(g);9 x$ A$ o* G. ]1 P$ D) @
- let kk = smooth(1, k);//平滑切换透明度% ~& c \* J$ r0 u1 t; c: a, I
- setComp(g, kk);
' u( Y4 E [8 P/ Y& T2 Q; ~ - db(g);
, n9 z6 l( Y1 f, j' K# K/ V - t.upload();
2 Q- f0 R. A2 U0 M7 Q# l- m& |5 i - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 }7 ]% P; \. g3 K6 R* x, ^$ P - ctx.setDebugInfo("k", k);, s& ]' L. D# |. w
- ctx.setDebugInfo("sm", kk);
3 ^+ S# X$ a) ~: n% [% n+ Z' l - rt = Date.now() - ti;0 B' ]& X6 \: I# |! U/ O9 ^+ m
- Thread.sleep(ck(rt - 1000 / fps));- _0 |) r$ {4 C1 F' G) M
- ctx.setDebugInfo("error", 0)
% i! _' f8 S. d, Z T2 } - } catch (e) {# m+ D/ R8 K8 Z6 w) p1 v
- ctx.setDebugInfo("error", e);
* \6 _0 ]) b9 G - } U0 l. Q6 c8 j$ e5 {0 y
- }- U: ~! [. r, y# K
- print("Thread end:" + id);
. }, x& q5 W4 T5 Y( ` - }& \4 {# \2 C% p, h% \
- let th = new Thread(run, "qiehuan");
3 E1 }' Q! A2 b/ I+ h- N% K - th.start();
8 p; \' c" b, E: M3 J0 k, D - }% C" H4 D2 `8 d. T! G
- 6 w8 g8 y) ~) C: X7 g% I
- function render(ctx, state, entity) {; ^3 ?8 _: ]9 i1 X4 g6 i5 m2 @; G
- state.f.tick();
4 L) v0 ~1 c" j6 y( b. g - }
8 z8 X$ o. f- S- |6 ~ - 4 i8 G- a- Y: ?+ G! `
- function dispose(ctx, state, entity) {
: Z+ R) i, j% }+ b - print("Dispose");
. `; z5 H D& ~2 w - state.running = false;
1 w ~& g& B: y4 y' {7 P - state.f.close();
1 R+ u+ Y. z; E; [& E - }- J7 e6 T' h f& @/ U* o
X5 F& p' w- ?4 Q- ^- function setComp(g, value) {
: q6 G$ C! ^8 g! f* S. } - g.setComposite(AlphaComposite.SrcOver.derive(value));
, h( H* g1 y' Y, O$ T: H( z - }
复制代码
6 E3 H, Z* _! n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。& j. ~. D5 W$ U! z$ g2 n2 u P
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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)- `% a; f! Z2 ?9 _1 Y* |7 O' O
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