1 package org.pileus.spades;
4 import java.util.HashMap;
6 import java.nio.ByteBuffer;
7 import java.nio.ByteOrder;
8 import java.nio.FloatBuffer;
10 import javax.microedition.khronos.egl.EGLConfig;
11 import javax.microedition.khronos.opengles.GL10;
13 import android.content.Context;
14 import android.content.res.Resources;
15 import android.graphics.Bitmap;
16 import android.graphics.BitmapFactory;
17 import android.graphics.BitmapFactory.Options;
18 import android.opengl.GLES20;
19 import android.opengl.GLSurfaceView;
20 import android.opengl.GLUtils;
21 import android.opengl.Matrix;
22 import android.view.MotionEvent;
24 public class Cards extends GLSurfaceView implements GLSurfaceView.Renderer
27 private final String vertSource
28 = "uniform mat4 u_model;"
29 + "uniform mat4 u_view;"
30 + "uniform mat4 u_proj;"
31 + "attribute vec4 a_position;"
32 + "attribute vec2 a_mapping;"
33 + "varying vec2 v_mapping;"
35 + " gl_Position = u_proj"
39 + " v_mapping = a_mapping;"
42 private final String fragSource
43 = "precision mediump float;"
44 + "uniform sampler2D u_texture;"
45 + "uniform vec4 u_color;"
46 + "varying vec2 v_mapping;"
48 + " gl_FragColor = texture2D("
49 + " u_texture, v_mapping);"
53 private final float faceCoords[] = {
54 -0.063f, 0.088f, 0.05f, // Standard poker size:
55 -0.063f, -0.088f, 0.05f, // 2.5in x 3.5in
56 0.063f, -0.088f, 0.05f, // 63mm x 88mm
57 0.063f, 0.088f, 0.05f, //
60 private final float backCoords[] = {
61 0.063f, 0.088f, 0.05f, // Standard poker size:
62 0.063f, -0.088f, 0.05f, // 2.5in x 3.5in
63 -0.063f, -0.088f, 0.05f, // 63mm x 88mm
64 -0.063f, 0.088f, 0.05f, //
67 private final float tableCoords[] = {
74 private final float mapCoords[] = {
81 private final float color[] = {
86 private final String cards[] = {
87 "As", "Ks", "Qs", "Js", "10s", "9s", "8s", "7s", "6s", "5s", "4s", "3s", "2s",
88 "Ah", "Kh", "Qh", "Jh", "10h", "9h", "8h", "7h", "6h", "5h", "4h", "3h", "2h",
89 "Ac", "Kc", "Qc", "Jc", "10c", "9c", "8c", "7c", "6c", "5c", "4c", "3c", "2c",
90 "Ad", "Kd", "Qd", "Jd", "10d", "9d", "8d", "7d", "6d", "5d", "4d", "3d", "2d",
94 private Resources res; // app resources
95 private Options options; // bitmap options
96 private int program; // opengl program
98 private float[] model; // model matrix
99 private float[] view; // view matrix
100 private float[] proj; // projection matrix
102 private FloatBuffer faceBuf; // vertex positions for front of card
103 private FloatBuffer backBuf; // vertex positions for back of card
104 private FloatBuffer tableBuf; // vertex positions for table
105 private FloatBuffer mapBuf; // texture mapping coord buffer
107 private int modelHandle; // model matrix
108 private int viewHandle; // view matrix
109 private int projHandle; // projection matrix
110 private int vertHandle; // vertex positions
111 private int mapHandle; // texture mapping coords
112 private int texHandle; // texture data
113 private int colorHandle; // color data
115 private int[] face; // card face textures
116 private int red; // red card back
117 private int blue; // blue card back
118 private int table; // table top texture
120 private boolean drag; // currently in drag event
121 private int pick; // currently picked card
122 private float xpos; // x drag position (0=left - 1-right)
123 private float ypos; // y drag position (0=bottom - 1-top)
124 private float ylim; // y limit for a play
126 private Map<String,Integer> index; // card name to index map
129 public Spades game; // the spades game
130 public String[] hand; // cards to display
131 public String[] pile; // played cards to display
133 /* GLSurfaceView Methods */
134 public Cards(Context context)
137 Os.debug("Cards: create");
139 this.res = context.getResources();
141 this.model = new float[4*4];
142 this.view = new float[4*4];
143 this.proj = new float[4*4];
145 this.face = new int[52];
149 this.hand = "As Ks Qs Js 10s 9s 8s 7s 6s 5s 4s 3s 2s".split(" ");
150 this.pile = "Ah Ac Ad".split(" ");
152 this.index = new HashMap<String,Integer>(52);
153 for (int i = 0; i < 52; i++)
154 this.index.put(this.cards[i], i);
156 this.setEGLContextClientVersion(2);
157 this.setRenderer(this);
158 this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
161 /* Renderer methods */
163 public void onSurfaceCreated(GL10 unused, EGLConfig config)
165 Os.debug("Cards: onSurfaceCreate");
167 /* Initialize shaders */
168 int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER, vertSource);
169 int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
171 /* Link shaders into an OpenGL program */
172 this.program = GLES20.glCreateProgram();
173 GLES20.glAttachShader(program, vertShader);
174 GLES20.glAttachShader(program, fragShader);
175 GLES20.glLinkProgram(program);
177 /* Get shaders attributes */
178 this.modelHandle = GLES20.glGetUniformLocation(program, "u_model");
179 this.viewHandle = GLES20.glGetUniformLocation(program, "u_view");
180 this.projHandle = GLES20.glGetUniformLocation(program, "u_proj");
181 this.vertHandle = GLES20.glGetAttribLocation(program, "a_position");
182 this.mapHandle = GLES20.glGetAttribLocation(program, "a_mapping");
183 this.texHandle = GLES20.glGetUniformLocation(program, "u_texture");
184 this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
186 /* Create vertex array */
187 this.faceBuf = this.loadBuffer(this.faceCoords);
188 this.backBuf = this.loadBuffer(this.backCoords);
189 this.tableBuf = this.loadBuffer(this.tableCoords);
190 this.mapBuf = this.loadBuffer(this.mapCoords);
192 /* Prevent texture scaling */
193 this.options = new BitmapFactory.Options();
194 this.options.inScaled = false;
197 for (int i = 0; i < 52; i++) {
198 String name = "card_" + this.cards[i].toLowerCase();
199 this.face[i] = this.loadTexture(name);
201 this.red = this.loadTexture("card_red");
202 this.blue = this.loadTexture("card_blue");
203 this.table = this.loadTexture("table");
206 Os.debug("Cards: onSurfaceCreate");
210 public void onDrawFrame(GL10 unused)
212 //Os.debug("Cards: onDrawFrame");
214 /* Turn on the program */
215 GLES20.glUseProgram(program);
218 GLES20.glClearColor(0, 0, 0, 1);
219 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
221 /* Setup projection matricies */
222 GLES20.glUniformMatrix4fv(this.viewHandle, 1, false, this.view, 0);
223 GLES20.glUniformMatrix4fv(this.projHandle, 1, false, this.proj, 0);
225 /* Setup buffers objects */
226 GLES20.glEnableVertexAttribArray(this.vertHandle);
227 GLES20.glEnableVertexAttribArray(this.mapHandle);
229 /* Setup texturing */
230 GLES20.glEnable(GLES20.GL_CULL_FACE);
231 GLES20.glEnable(GLES20.GL_BLEND);
232 GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
233 GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
234 GLES20.glUniform1i(this.texHandle, 0);
244 public void onSurfaceChanged(GL10 unused, int width, int height)
246 Os.debug("Cards: onSurfaceChanged");
248 GLES20.glViewport(0, 0, width, height);
250 Matrix.setIdentityM(this.model, 0);
251 Matrix.setIdentityM(this.view, 0);
252 Matrix.setIdentityM(this.proj, 0);
256 float yang = xang * ((float)height / (float)width);
258 Matrix.frustumM(this.proj, 0,
259 -1E-6f * xang, // left
260 1E-6f * xang, // right
261 -1E-6f * yang, // bottom
266 Matrix.rotateM(this.view, 0, 10f, 1, 0, 0);
267 Matrix.translateM(this.view, 0, 0, 0, -1.5f);
268 Matrix.rotateM(this.view, 0, -45f, 1, 0, 0);
272 public boolean onTouchEvent(MotionEvent event)
274 boolean up = event.getActionMasked() == MotionEvent.ACTION_UP;
276 float x = event.getX() / this.getWidth();
277 float y = 1-(event.getY() / this.getHeight());
281 int num = this.hand.length;
283 this.pick = (int)Math.floor((x*num));
284 if (this.pick < 0) this.pick = 0;
285 if (this.pick >= num) this.pick = num-1;
287 if (y < this.ylim && !this.drag) {
288 //Os.debug("Cards: onTouchEvent - starting drag");
292 //Os.debug("Cards: onTouchEvent - move " + x + "," + y);
293 this.requestRender();
295 if (y >= this.ylim && this.drag && up) {
296 //Os.debug("Cards: onTouchEvent - playing card");
297 this.game.onPlay(this.hand[this.pick]);
300 //Os.debug("Cards: onTouchEvent - ending drag");
306 /* Private loading methods */
307 private int loadShader(int type, String code)
309 Os.debug("Cards: loadShader");
311 int shader = GLES20.glCreateShader(type);
312 GLES20.glShaderSource(shader, code);
313 GLES20.glCompileShader(shader);
317 private int loadTexture(String name)
319 //Os.debug("Cards: loadTexture - " + name);
321 final int[] tex = new int[1];
323 /* Lookup the resource ID */
326 id = R.drawable.class.getField(name).getInt(null);
327 } catch(Exception e) {
328 Os.debug("Cards: lookup failed for '" + name + "'", e);
332 /* Load the bitmap */
333 Bitmap bitmap = BitmapFactory.decodeResource(this.res, id, this.options);
335 /* Copy into OpenGL */
336 GLES20.glGenTextures(1, tex, 0);
337 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
338 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
339 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
340 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
345 private FloatBuffer loadBuffer(float[] data)
347 ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
348 bytes.order(ByteOrder.nativeOrder());
350 FloatBuffer buf = bytes.asFloatBuffer();
357 /* Private drawing methods */
358 private void drawTable()
361 Matrix.setIdentityM(this.model, 0);
362 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
365 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.tableBuf);
366 GLES20.glVertexAttribPointer(this.mapHandle, 2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
367 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, this.table);
368 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
371 private void drawPile()
373 /* Draw played cards */
374 for (int i = 0; i < 4; i++) {
375 if (i >= this.pile.length || this.pile[i] == null)
380 Matrix.setIdentityM(this.model, 0);
382 Matrix.rotateM(this.model, 0, -ang, 0f, 0f, 1f);
383 Matrix.translateM(this.model, 0, -0.30f, 0f, 0f);
384 Matrix.rotateM(this.model, 0, ang, 0f, 0f, 1f);
385 Matrix.scaleM(this.model, 0, 3f, 3f, 0f);
387 this.drawCard(this.pile[i]);
391 private void drawHand()
394 int num = this.hand.length;
395 for (int i = 0; i < num; i++) {
396 if (this.drag && this.ypos >= this.ylim && i == this.pick)
399 Matrix.setIdentityM(this.model, 0);
401 Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
402 Matrix.translateM(this.model, 0, 0f, -0.3f, 1.20f);
405 float pct = (float)(i+0.5) / num;
406 float err = this.xpos - pct;
407 float y = (float)this.ypos / this.ylim;
408 float lim = Math.min(Math.max(y,0),1);
410 * (float)Math.exp(-10*num*Math.pow(y*err,2))
411 * (1f-(float)Math.pow(1-lim, 2));
412 Matrix.translateM(this.model, 0, 0, fcn, 0);
415 float left = -20f + 20f*(1f/num);
416 float right = 54f - 54f*(1f/num);
417 float ang = left + i*(right-left)/num;
418 Matrix.rotateM(this.model, 0, ang, 0f, 0f, -1f);
419 Matrix.translateM(this.model, 0, 0f, 0.15f, 0f);
421 this.drawCard(this.hand[i]);
425 private void drawPick()
427 /* Draw selected card */
428 if (this.drag && this.ypos >= this.ylim) {
429 Matrix.setIdentityM(this.model, 0);
430 Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
431 Matrix.translateM(this.model, 0, 0f, 0f, 1.20f);
432 this.drawCard(this.hand[this.pick]);
436 private void drawCard(String name)
438 if (!this.index.containsKey(name))
440 int idx = this.index.get(name);
441 int front = this.face[idx];
444 /* Set model matrix */
445 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
448 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.faceBuf);
449 GLES20.glVertexAttribPointer(this.mapHandle, 2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
450 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, front);
451 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
454 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.backBuf);
455 GLES20.glVertexAttribPointer(this.mapHandle, 2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
456 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, back);
457 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);