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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。# n i2 u5 @5 L: n
- importPackage (java.lang);
. L+ L3 m6 d* Y& s# ` - importPackage (java.awt);8 n( |" l( `. C; C! h8 C; H
- % |3 H/ h+ E/ s( R0 y9 m
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. U- G2 G1 S: |' r, _- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: E; C, K1 o% }1 |" W
- * d* x) Z5 T$ {4 q/ ~( E
- function getW(str, font) {6 H" Y6 \3 U* W% t6 }) O
- let frc = Resources.getFontRenderContext();
4 }3 _' J5 V8 P9 | E - bounds = font.getStringBounds(str, frc);5 F6 @% ]9 Y( f, u& Y$ I- h
- return Math.ceil(bounds.getWidth());
, }0 v& t3 s( w: i - }
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- da = (g) => {//底图绘制' e8 p" Y+ o- e; p
- g.setColor(Color.BLACK);
& i+ H9 H6 z8 F7 g+ d6 v- F2 S. x8 ~ - g.fillRect(0, 0, 400, 400);* o3 a3 Y" J" N4 F
- }
: H' y& E8 M& G' V4 n3 B, ^
) c, W @; u" K6 G- db = (g) => {//上层绘制6 |6 U$ Y8 M$ m/ n5 E
- g.setColor(Color.WHITE);
8 E3 M3 ~# A* P! s" Q/ ^+ f - g.fillRect(0, 0, 400, 400);9 o- p" i/ \$ H3 X2 q$ f
- g.setColor(Color.RED);% ~1 q* O* p1 R# }, z/ x+ \4 ?
- g.setFont(font0);
" u @9 m4 m% u+ U w0 X5 Y - let str = "晴纱是男娘";5 ?& a p+ B7 D7 S
- let ww = 400;
: S) p" s; G+ n) N% J - let w = getW(str, font0);$ E: F1 a) H! U8 ]8 K. E
- g.drawString(str, ww / 2 - w / 2, 200);- u' a8 J: ?: v, r; s6 _
- }
# L0 M+ \7 r* \& t$ U( K
6 `2 q- `: w9 G8 J' B- const mat = new Matrices();" P- w' b0 d2 q
- mat.translate(0, 0.5, 0);$ k( ~3 G j7 h; b) v' R
_- K- S6 y& e) K$ h, b- function create(ctx, state, entity) {
! p# Z+ z) j* f8 \4 [! F - let info = {$ P8 a a: K- j9 z% Q& _ ]
- ctx: ctx,
2 q; B+ P; T; X# Y2 y5 X# _+ M+ ? - isTrain: false,/ j" p* G1 E4 g, _% W) L
- matrices: [mat],2 z8 _7 K5 S+ k1 w5 [
- texture: [400, 400],. m7 V/ d9 @) P, v- X; n" M/ O
- model: {
1 k8 H2 e. F: x& ?' K - renderType: "light",& C; s4 K8 ]/ ]
- size: [1, 1],
1 f9 q: x" ~- @7 a2 F - uvSize: [1, 1]
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- }: H. L1 U; j2 H- U
- let f = new Face(info);
0 u; x2 j. K1 p+ j4 R - state.f = f;& @+ m3 B; B6 k- W
- + C8 F; _- H% M% j5 N6 B
- let t = f.texture;# A: F2 \4 j$ C8 @, ] z
- let g = t.graphics;1 k, u, `- o" ^6 L% E( p
- state.running = true;* i, `, a# ^) J
- let fps = 24;. h# h' G0 v3 O2 F! N# K( O& [4 E
- da(g);//绘制底图, W2 Q. ]# |+ @0 }( W. V0 j% Z
- t.upload();
0 d! y4 q7 t5 l - let k = 0;
( Z' I9 S" D( u4 G4 U( Q6 i - let ti = Date.now();: ~/ C) W: c# `9 J0 ]
- let rt = 0;% z8 a/ W% W8 H3 i. h v6 J
- smooth = (k, v) => {// 平滑变化
! a/ Y% T9 i$ |; ~$ n/ z - if (v > k) return k;
0 c8 C3 n- i# d1 A; T - if (k < 0) return 0;8 p4 q: w |7 @# I5 V, Z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 _6 g8 E! p# S0 c# ^
- }
3 L+ F# v- |" v2 R2 s7 d' y - run = () => {// 新线程& v* q0 T. R: u% w' n/ R- Y% ^
- let id = Thread.currentThread().getId();
$ t& x* N3 K: t A2 _ - print("Thread start:" + id);
8 ?2 @3 l+ R1 _9 Y0 N - while (state.running) {
# F, d. X3 J& }9 L) T/ Q - try {
) B/ h9 c- a' u+ A8 E) a - k += (Date.now() - ti) / 1000 * 0.2;
) g$ S% R# h9 f4 U( { - ti = Date.now();
1 b: y$ e" [3 ?5 p. z - if (k > 1.5) {
' z. O8 X+ Q8 O c( K) x9 J1 P - k = 0;
! W4 y; ~7 _- w. e3 f/ t- ^5 }8 X - }
3 ^0 v5 H, I1 A+ p) S - setComp(g, 1);
6 c+ n/ E* A; s) x! T - da(g);$ c8 z- G) }" z8 {+ Q1 a/ X3 @1 u
- let kk = smooth(1, k);//平滑切换透明度3 {2 q6 [5 N( u4 a9 p6 Y" l K# y
- setComp(g, kk);# d5 A- X1 t! H* m o3 M
- db(g);% y' f G6 W* \/ C- ?% X& H3 ]
- t.upload();) b4 Z" {- A3 Y& O0 b& z; W" |6 _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 V" u& t2 Q; o# Z - ctx.setDebugInfo("k", k);
3 g- w! K; ~8 C - ctx.setDebugInfo("sm", kk);* I5 N/ w/ d, [0 L7 h
- rt = Date.now() - ti;
$ w( Q6 c# p6 _0 V7 I, a' B - Thread.sleep(ck(rt - 1000 / fps));5 y4 J) f$ m0 @* {
- ctx.setDebugInfo("error", 0)
% `3 E! z! Y8 i - } catch (e) {9 X$ C1 I8 E1 ]3 K1 o k
- ctx.setDebugInfo("error", e);* l0 C) K1 ] l
- }
: h1 C* g- }: d: @ - }
% D+ }' W! u0 Z& c - print("Thread end:" + id);
# f& |) ]1 _# h9 C/ m8 H2 K( o - }
, w4 m( ]2 U- C f, ?9 {/ Y7 M; u - let th = new Thread(run, "qiehuan");
; [& {" T: ?7 X3 H7 v7 L - th.start();4 Q4 I4 h( m) o2 A1 S
- }
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- function render(ctx, state, entity) { {) Z6 ?9 {# \$ z; | r0 w
- state.f.tick();* O; B4 H& a* U+ g9 c( Q( C/ r4 m2 F
- }8 y' K* o: Z+ P0 m0 W/ b2 `; B
7 m* V5 ^$ B' L9 V0 _( f/ E3 S: a' |& W- function dispose(ctx, state, entity) {
4 s% K* Z: x: ~ - print("Dispose");3 y N) o4 R* r5 h# V
- state.running = false;/ Q& c( w* h: m& Y
- state.f.close();
* U1 y/ b7 @* L' B - }3 s( A- A3 B' G0 m b
- % W: r/ I6 `5 z: y) e) f8 [" o+ h6 k$ \
- function setComp(g, value) {
3 k0 T: ?) P `+ p/ d3 `7 a - g.setComposite(AlphaComposite.SrcOver.derive(value));
+ U/ o% V6 s% g! u8 d - }
复制代码 ' h6 F: Y& ^1 F
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。1 X& V' \4 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)9 i/ _8 A: z; N; D
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