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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。
1 i. l O2 W$ f7 o! i" S0 S- importPackage (java.lang);. w9 F" E9 Z! w7 h6 t. |
- importPackage (java.awt);/ N( H& j! i7 w# F0 @7 w
/ V' q0 x5 r% T7 M& ]* D f- include(Resources.id("mtrsteamloco:library/code/face.js"));
! Z) Q- H2 q# x5 i4 }
8 `' j" t/ M/ t! @( C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" @, @) r+ l- [% o1 J+ i3 ^: t8 v
4 }/ z3 b1 P3 }- function getW(str, font) {$ H8 p4 t* H. G. j' Q$ x( ^6 A
- let frc = Resources.getFontRenderContext();
& V0 r9 F5 }5 Y% h2 L9 W; T: }+ Y* b - bounds = font.getStringBounds(str, frc);
5 Q" O9 @8 y7 j - return Math.ceil(bounds.getWidth());; s4 r$ n/ `% h/ p7 x$ _- H; b
- }( @9 _ {) f& h' n2 R6 z3 j, Z
2 W& ]0 t3 M2 ~7 j9 _( x, G- da = (g) => {//底图绘制
; U J& }9 L$ p' A3 ~ - g.setColor(Color.BLACK);
* }3 l ^. K& |, Z$ U$ I' s - g.fillRect(0, 0, 400, 400);
; J( a9 v# k& R! ?4 P - } } Z! e {6 X/ M9 F
% O5 [8 V; f/ ^" A3 h- db = (g) => {//上层绘制' U0 h9 r8 }/ c$ v
- g.setColor(Color.WHITE);9 B% s2 [+ o3 ~ W7 n: E
- g.fillRect(0, 0, 400, 400);
# E9 a5 m0 ^3 H$ r9 m* M6 A i1 i - g.setColor(Color.RED);9 S2 u; | \1 h) m
- g.setFont(font0);/ i; }( x9 P! e8 t1 V* \! [0 i2 N. a" y
- let str = "晴纱是男娘";3 ^/ |. Y2 H& L- j7 {
- let ww = 400;
+ U8 V" z/ y+ p" L# s - let w = getW(str, font0);
0 a, H" Z. |& H" y. L3 H# ~7 v - g.drawString(str, ww / 2 - w / 2, 200);5 u( D; \3 A0 ~( \' H( N: |5 u+ G
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- , M. c+ @) l9 H1 Y8 F( n
- const mat = new Matrices();
: @6 H" Y& \. \ - mat.translate(0, 0.5, 0);
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: g& t* x) @' \5 a- function create(ctx, state, entity) {
. x [7 z" U7 S& ` - let info = {
! ^4 R0 y2 r/ e - ctx: ctx,
! g: G) c. R* j4 L8 N0 { - isTrain: false,
* |2 S3 u5 g G& P) K - matrices: [mat],7 }+ Z6 W: k& d8 D: J, Y0 j' A5 Z
- texture: [400, 400],
5 M% f# S" ^+ {2 A' D# R4 t - model: {
% M! C. Q. v) p2 H - renderType: "light",, ?* D' K- K( ]7 |4 K
- size: [1, 1],
6 H/ c: Y/ n" t - uvSize: [1, 1]. B; H9 u8 c# @+ U
- }3 f* Q2 F$ H" k6 U! c
- }3 k8 v/ ^. o& K% v" f/ J o$ u
- let f = new Face(info);
) h/ I' ^; L7 f! [+ E& e' Z - state.f = f;
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, ?& [9 L" n4 n( q# p" q- let t = f.texture;
, C' i/ k- w. d% b' e2 Y: } - let g = t.graphics;- G# ~" N2 V n4 h
- state.running = true;
: s( I4 A/ r* Z( ~( S& m J - let fps = 24;
3 B: K3 F, ~" u' _* e0 b - da(g);//绘制底图
5 I# Z$ t/ z; a# S1 e* o0 {1 X- S - t.upload();
5 c, ~. ^. H4 y( A# q" K - let k = 0;
7 \4 B+ S6 x2 k' v7 E8 R" }( H - let ti = Date.now();2 v: Y% H: ?7 U6 @: k
- let rt = 0;( H. `/ b. {- q2 ]* e3 p
- smooth = (k, v) => {// 平滑变化2 p }8 ?# ~' @/ Q/ k7 V% J
- if (v > k) return k;; x/ p7 M, k- Q& p$ V
- if (k < 0) return 0;. }9 y5 b9 P1 U2 f9 f5 K
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) y, L' t, _# ]! l M+ V! n: w
- }
: Z- r8 e& x& }, R0 S& M2 U8 q7 r - run = () => {// 新线程
, _# X) X* X& y' I5 _1 k - let id = Thread.currentThread().getId();/ z; d+ F7 i0 e
- print("Thread start:" + id);; B3 I$ q" x8 N, @! i5 j3 q. S8 }' R& j
- while (state.running) {
5 ^" @/ g: @* {, u9 @: j - try {
$ S9 E2 l! u( Q- u% r - k += (Date.now() - ti) / 1000 * 0.2;
7 k& T; ?1 M) Z1 }; r - ti = Date.now();( T1 N- U; }0 u* K, i
- if (k > 1.5) {
5 K7 q% E1 r& T; x8 ? - k = 0;- {' B0 k- R8 |, j3 m4 U7 m) b6 U6 X/ _
- }
3 Z# `: w+ d: j - setComp(g, 1);
( q; ^: Z; t4 a - da(g);
7 F" y2 \0 r+ m H - let kk = smooth(1, k);//平滑切换透明度
0 |: o, W* Y0 _7 J. E2 }6 o0 L2 |" s3 H! o - setComp(g, kk);3 k0 R$ b$ y/ B
- db(g);
' Q: P, {, F( j. r" v# i, ], H - t.upload();
0 \$ f7 E% @/ r$ }5 J - ctx.setDebugInfo("rt" ,Date.now() - ti);' n8 M) h2 U" q1 ^3 Q
- ctx.setDebugInfo("k", k);0 j4 l* a0 f& X2 _$ ^' g; ]
- ctx.setDebugInfo("sm", kk);
; U6 L& {& J( E2 S' B) i7 G - rt = Date.now() - ti;. _% k: V; P' W& }9 V: q
- Thread.sleep(ck(rt - 1000 / fps));6 K3 B2 U+ Y* ^) I( ]% Y
- ctx.setDebugInfo("error", 0)2 T& e4 q, h: I3 V: s! K
- } catch (e) {
0 D; T: ]% }9 }+ K' @/ I - ctx.setDebugInfo("error", e);
- D& k0 M* r$ s. U/ k, S' J - }* p" N# j! T& U& C" y2 z U8 N8 |
- }
8 z' A' S/ a2 y) E - print("Thread end:" + id);$ @7 g ]! w, L
- }
' e! d+ T# N4 Z0 R, A - let th = new Thread(run, "qiehuan");
0 W/ q, B6 f9 d( H! L - th.start();) |# d9 |1 j7 x
- }
, Y1 f& [, P& S. d! M6 l2 g
- N% p& u/ P [7 V* T+ L- function render(ctx, state, entity) {8 z9 u% @4 m: Y/ t6 g. \
- state.f.tick();
( F* [* q- ~1 ?& D+ u& k: o- n - }0 `% `( D' P2 j$ H& {( ^
- : @* w- u6 r2 D8 _
- function dispose(ctx, state, entity) {
5 L9 Z9 A$ P4 b) ` - print("Dispose");
3 Z: S& C6 F/ Y( d; K( |' y# a - state.running = false;. w, O* g$ G) J' y1 r
- state.f.close();
- x' m7 k6 k, R. r - }
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- function setComp(g, value) {
S/ z. w, M1 E - g.setComposite(AlphaComposite.SrcOver.derive(value));
: S# S) Z0 F8 i4 w$ ^# }! Z - }
复制代码 $ z& g0 E* }) g3 y( j7 p# A- K8 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。
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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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