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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。' u& z# B1 e2 ~
- importPackage (java.lang);
& Q# m2 l: {: u L+ j0 K - importPackage (java.awt);8 K' S. F6 X4 _4 W& \
, ]. N! u% O3 }9 s& J# V7 @7 |- include(Resources.id("mtrsteamloco:library/code/face.js"));
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: i3 J: u6 x$ G+ V( _' s- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( x! S" ^) ]3 p! H1 S( p
- 5 M( G% }0 H& Y6 x& {0 i6 y* Z
- function getW(str, font) {
) @4 ~. v( @0 w) q% x3 b - let frc = Resources.getFontRenderContext();1 u: N/ U, T& `/ e( n- G
- bounds = font.getStringBounds(str, frc);
2 B1 W6 x: M; ^8 f/ W+ a% Y - return Math.ceil(bounds.getWidth());
- s# u2 j' V8 G! n) t. ` - }
1 g# w9 K8 Y2 t6 w
! z' C# O/ I& O1 }5 P9 a- da = (g) => {//底图绘制0 E7 l+ F3 r, Y8 n' ~. _+ e
- g.setColor(Color.BLACK);
/ [* t: e6 g4 K/ t - g.fillRect(0, 0, 400, 400);
" }4 u6 v& ^& `8 ]! R w2 ` - }; S, c2 t9 }8 l7 B$ R2 S& b. B k
- - l0 u- b& i$ {' ~
- db = (g) => {//上层绘制
! a" d# g* y& S6 q! A* p' U - g.setColor(Color.WHITE);
1 Y2 l9 }3 ~2 E7 Q9 C' B - g.fillRect(0, 0, 400, 400);
# `2 I/ k+ d- E( y+ L! x" D - g.setColor(Color.RED);1 |- s5 r- V* V4 S' l \2 L/ F
- g.setFont(font0);" c$ c3 @7 J+ s0 B+ s
- let str = "晴纱是男娘";; J$ o% G8 I S* i/ L: c8 d
- let ww = 400;* ?% h- d+ ^- H: o+ R, I) |. I
- let w = getW(str, font0);% x1 ~; z4 x: h2 R5 R) T
- g.drawString(str, ww / 2 - w / 2, 200);
" ]9 X" p7 S8 Q& ]2 I5 s - }
+ x2 j; L+ X, x- T& p
4 b3 [* g( W& h! Q- const mat = new Matrices();
3 F. n* P0 R- T c, B$ v; w" E - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
4 s5 U8 e$ }% K7 J - let info = {
8 N4 `0 z+ x* f h5 Y% n0 s - ctx: ctx," {* R I+ p; k: a# |
- isTrain: false,+ M3 G1 `1 L3 W' r! J
- matrices: [mat],8 a; ^: K; D' c4 }+ D! M: Q
- texture: [400, 400],, N# B- _9 \9 u7 a2 s7 f0 U
- model: {
6 ^0 X- e& s# O' h/ \3 ~' i - renderType: "light",' x: I7 |- s: K$ K% }. l; W0 G
- size: [1, 1],: b8 B( F9 @4 n, M/ i/ `8 F
- uvSize: [1, 1]# G1 }# ]& ^+ D" H- o6 x
- }
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- let f = new Face(info);
- A3 [5 u9 Y: _! d - state.f = f;
: c/ d0 }8 a r' m: t! F
8 n' ~1 T- C: |- let t = f.texture;( |) r) m, f8 e/ W' j
- let g = t.graphics;
% G" \% Q& p4 C, J( { - state.running = true;4 L' g6 I$ C! ?, f( A0 M) @
- let fps = 24;
~+ K- G2 W" W, j, {- ~ - da(g);//绘制底图* W: [. `! e( Y; I- Z* S7 u" K
- t.upload();
, h9 H" r$ J. J - let k = 0;
; S* ~+ i! w8 l6 n5 K h$ o - let ti = Date.now(); u3 K7 e0 w5 |( q0 I' ^
- let rt = 0;! b' n8 u5 @6 e/ v+ z! @
- smooth = (k, v) => {// 平滑变化- a& z7 }+ ?6 h) Z" m Q
- if (v > k) return k;4 d. }; B- p. N, g0 T
- if (k < 0) return 0;, A: [$ h" P; `
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 Q$ i7 z0 f6 F- K" l, g$ t - }
' P( Y; |& @+ C3 R - run = () => {// 新线程
- l& M) U( O! B$ [: @1 f$ o - let id = Thread.currentThread().getId();
$ V8 |1 J$ p- G, p, B8 i - print("Thread start:" + id);5 K& J' a/ T0 ?) \
- while (state.running) {& G4 [' d. g: w6 q
- try { i* r2 X6 Y1 A& a5 B/ ?( @
- k += (Date.now() - ti) / 1000 * 0.2;
]' B+ c7 M, j' F! @( [ - ti = Date.now();
" q4 G0 y8 N! c0 u - if (k > 1.5) {
, r4 R- x# R9 O* ^+ C# Y5 N - k = 0;% ]" C% ]* b9 H5 Q
- }' h- q. R; {2 j/ \8 G( g
- setComp(g, 1);5 M! h+ e g8 V- k. b
- da(g);- F: s7 D$ A$ J: \5 E8 h" I; @
- let kk = smooth(1, k);//平滑切换透明度
3 i( r! |8 W$ T% F# S - setComp(g, kk);) S5 z! `7 V2 Y, e& ?# A7 z9 T
- db(g);
7 Y5 S4 V( V+ |9 d1 C4 ` - t.upload();
: b' B# {2 O( @7 j, @' ]+ X7 x( [ - ctx.setDebugInfo("rt" ,Date.now() - ti);5 Q; D7 i+ S2 |" q2 T! R
- ctx.setDebugInfo("k", k);8 o% F$ ?0 K8 O% D& ~ a: ]
- ctx.setDebugInfo("sm", kk); e9 D" A- H4 \$ @2 k
- rt = Date.now() - ti;
! T6 Y1 o- D0 M* A4 K! g - Thread.sleep(ck(rt - 1000 / fps));9 q# a7 Q6 q& l6 _' z
- ctx.setDebugInfo("error", 0)
. Q$ K' g) d0 B1 } - } catch (e) {
- j% Z! U ]$ T. e1 @" m9 B! T - ctx.setDebugInfo("error", e);, O1 d( A: V* q# U* O2 y& G9 M; \6 W, j4 _
- }/ G/ V2 c/ h' c
- } ?4 q$ A% e' }+ I
- print("Thread end:" + id);' v' b% c- r5 g" c! Y
- }% s* e' A& u7 @* T
- let th = new Thread(run, "qiehuan");
# U5 N" B! ]8 e* M9 Q7 g/ A3 U - th.start();
# v1 r& W% c$ ^% Z* W# F3 f% W - }
. u" z8 o1 t: W b$ S" p2 L - : n0 s2 V1 J7 s4 x+ G
- function render(ctx, state, entity) {
2 ?& ^, h/ {4 f0 u l" D2 S - state.f.tick();
% Z2 E! P2 g8 a5 j* C' I9 T - }
! ~6 \; b( M* P/ [4 l; Q* |
5 l n. {: f b E9 E- function dispose(ctx, state, entity) {( {7 E& t9 x# [) ?
- print("Dispose");
+ s0 f3 H3 F, F9 x - state.running = false;& W, M! j8 J9 E9 l& ] o
- state.f.close();
4 b8 i0 U7 G. w, ] Q7 l+ F - }
( t( l7 H0 N( J o
# m, v! d0 N0 b5 d- function setComp(g, value) {" }4 U$ o2 j0 T* U4 c; q5 J l
- g.setComposite(AlphaComposite.SrcOver.derive(value));" m) ]1 X( _- n& ~! k* h9 z
- }
复制代码 * }1 b) w x2 e# d! H) v# 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。8 o* |: P" b% k9 E8 q( D$ V) u
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, G. H( f- @# g9 p: i* M; _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)8 p: _" ~ ^. r j/ C
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