Pileus Git - ~andy/spades/blob - src/org/pileus/spades/Cards.java

   1 package org.pileus.spades;
   2
   3 import java.util.Map;
   4 import java.util.HashMap;
   5
   6 import java.nio.ByteBuffer;
   7 import java.nio.ByteOrder;
   8 import java.nio.FloatBuffer;
   9
  10 import javax.microedition.khronos.egl.EGLConfig;
  11 import javax.microedition.khronos.opengles.GL10;
  12
  13 import android.content.Context;
  14 import android.content.res.Resources;
  15 import android.graphics.Bitmap;
  16 import android.graphics.BitmapFactory;
  17 import android.opengl.GLES20;
  18 import android.opengl.GLSurfaceView;
  19 import android.opengl.GLUtils;
  20 import android.opengl.Matrix;
  21 import android.view.MotionEvent;
  22
  23 public class Cards extends GLSurfaceView implements GLSurfaceView.Renderer
  24 {
  25         /* Shader data */
  26         private final String vertSource
  27                 = "uniform   mat4 u_model;"
  28                 + "uniform   mat4 u_view;"
  29                 + "uniform   mat4 u_proj;"
  30                 + "attribute vec4 a_position;"
  31                 + "attribute vec2 a_mapping;"
  32                 + "varying   vec2 v_mapping;"
  33                 + "void main() {"
  34                 + "  gl_Position = u_proj"
  35                 + "              * u_view"
  36                 + "              * u_model"
  37                 + "              * a_position;"
  38                 + "  v_mapping   = a_mapping;"
  39                 + "}";
  40
  41         private final String fragSource
  42                 = "precision mediump   float;"
  43                 + "uniform   sampler2D u_texture;"
  44                 + "uniform   vec4      u_color;"
  45                 + "varying   vec2      v_mapping;"
  46                 + "void main() {"
  47                 + "  gl_FragColor = texture2D("
  48                 + "    u_texture, v_mapping);"
  49                 + "}";
  50
  51         /* Drawing data */
  52         private final float  faceCoords[] = {
  53                 -0.063f,  0.088f, 0.05f, // Standard poker size:
  54                 -0.063f, -0.088f, 0.05f, //   2.5in x 3.5in
  55                  0.063f, -0.088f, 0.05f, //   63mm  x 88mm
  56                  0.063f,  0.088f, 0.05f, //
  57         };
  58
  59         private final float  backCoords[] = {
  60                  0.063f,  0.088f, 0.05f, // Standard poker size:
  61                  0.063f, -0.088f, 0.05f, //   2.5in x 3.5in
  62                 -0.063f, -0.088f, 0.05f, //   63mm  x 88mm
  63                 -0.063f,  0.088f, 0.05f, //
  64         };
  65
  66         private final float  tableCoords[] = {
  67                 -0.75f,  0.75f, 0,
  68                 -0.75f, -0.75f, 0,
  69                  0.75f, -0.75f, 0,
  70                  0.75f,  0.75f, 0,
  71         };
  72
  73         private final float  mapCoords[] = {
  74                 0.0f, 0.0f,
  75                 0.0f, 1.0f,
  76                 1.0f, 1.0f,
  77                 1.0f, 0.0f,
  78         };
  79
  80         private final float  color[] = {
  81                 1, 0, 0, 1
  82         };
  83
  84         /* Cards data */
  85         private final String cards[] = {
  86                 "As", "Ks", "Qs", "Js", "10s", "9s", "8s", "7s", "6s", "5s", "4s", "3s", "2s",
  87                 "Ah", "Kh", "Qh", "Jh", "10h", "9h", "8h", "7h", "6h", "5h", "4h", "3h", "2h",
  88                 "Ac", "Kc", "Qc", "Jc", "10c", "9c", "8c", "7c", "6c", "5c", "4c", "3c", "2c",
  89                 "Ad", "Kd", "Qd", "Jd", "10d", "9d", "8d", "7d", "6d", "5d", "4d", "3d", "2d",
  90         };
  91
  92         /* Private data */
  93         private Resources    res;         // app resources
  94         private int          program;     // opengl program
  95
  96         private float[]      model;       // model matrix
  97         private float[]      view;        // view matrix
  98         private float[]      proj;        // projection matrix
  99
 100         private FloatBuffer  faceBuf;     // vertex positions for front of card
 101         private FloatBuffer  backBuf;     // vertex positions for back of card
 102         private FloatBuffer  tableBuf;    // vertex positions for table
 103         private FloatBuffer  mapBuf;      // texture mapping coord buffer
 104
 105         private int          modelHandle; // model matrix
 106         private int          viewHandle;  // view matrix
 107         private int          projHandle;  // projection matrix
 108         private int          vertHandle;  // vertex positions
 109         private int          mapHandle;   // texture mapping coords
 110         private int          texHandle;   // texture data
 111         private int          colorHandle; // color data
 112
 113         private int[]        face;        // card face textures
 114         private int          red;         // red card back
 115         private int          blue;        // blue card back
 116         private int          table;       // table top texture
 117
 118         private boolean      drag;        // currently in drag event
 119         private int          pick;        // currently picked card
 120         private float        xpos;        // x drag position (0=left   - 1-right)
 121         private float        ypos;        // y drag position (0=bottom - 1-top)
 122         private float        ylim;        // y limit for a play
 123
 124         private Map<String,Integer> index; // card name to index map
 125
 126         /* Properties */
 127         public Spades        game;        // the spades game
 128         public String[]      hand;        // cards to display
 129         public String[]      pile;        // played cards to display
 130
 131         /* GLSurfaceView Methods */
 132         public Cards(Context context)
 133         {
 134                 super(context);
 135                 Os.debug("Cards: create");
 136
 137                 this.res   = context.getResources();
 138
 139                 this.model = new float[4*4];
 140                 this.view  = new float[4*4];
 141                 this.proj  = new float[4*4];
 142
 143                 this.face  = new int[52];
 144
 145                 this.ylim  = 0.4f;
 146
 147                 this.hand  = new String[] {
 148                         "As", "7s", "6s",  "6h", "2h", "Ac",
 149                         "Kc", "3c", "10d", "9d", "8d", "7d", "2d"
 150                 };
 151
 152                 this.pile  = new String[] {
 153                         "As", "7s", "6s"
 154                 };
 155
 156                 this.index = new HashMap<String,Integer>(52);
 157                 for (int i = 0; i < 52; i++)
 158                         this.index.put(this.cards[i], i);
 159
 160                 this.setEGLContextClientVersion(2);
 161                 this.setRenderer(this);
 162                 this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
 163         }
 164
 165         /* Renderer methods */
 166         @Override
 167         public void onSurfaceCreated(GL10 unused, EGLConfig config)
 168         {
 169                 Os.debug("Cards: onSurfaceCreate");
 170
 171                 /* Initialize shaders */
 172                 int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER,   vertSource);
 173                 int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
 174
 175                 /* Link shaders into an OpenGL program */
 176                 this.program = GLES20.glCreateProgram();
 177                 GLES20.glAttachShader(program, vertShader);
 178                 GLES20.glAttachShader(program, fragShader);
 179                 GLES20.glLinkProgram(program);
 180
 181                 /* Get shaders attributes */
 182                 this.modelHandle = GLES20.glGetUniformLocation(program, "u_model");
 183                 this.viewHandle  = GLES20.glGetUniformLocation(program, "u_view");
 184                 this.projHandle  = GLES20.glGetUniformLocation(program, "u_proj");
 185                 this.vertHandle  = GLES20.glGetAttribLocation(program, "a_position");
 186                 this.mapHandle   = GLES20.glGetAttribLocation(program, "a_mapping");
 187                 this.texHandle   = GLES20.glGetUniformLocation(program, "u_texture");
 188                 this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
 189
 190                 /* Create vertex array  */
 191                 this.faceBuf  = this.loadBuffer(this.faceCoords);
 192                 this.backBuf  = this.loadBuffer(this.backCoords);
 193                 this.tableBuf = this.loadBuffer(this.tableCoords);
 194                 this.mapBuf   = this.loadBuffer(this.mapCoords);
 195
 196                 /* Load textures */
 197                 for (int i = 0; i < 52; i++) {
 198                         String name = "card_" + this.cards[i].toLowerCase();
 199                         this.face[i] = this.loadTexture(name);
 200                 }
 201                 this.red   = this.loadTexture("card_red");
 202                 this.blue  = this.loadTexture("card_blue");
 203                 this.table = this.loadTexture("table");
 204
 205                 /* Debug */
 206                 Os.debug("Cards: onSurfaceCreate");
 207         }
 208
 209         @Override
 210         public void onDrawFrame(GL10 unused)
 211         {
 212                 //Os.debug("Cards: onDrawFrame");
 213
 214                 /* Turn on the program */
 215                 GLES20.glUseProgram(program);
 216
 217                 /* Reset view */
 218                 GLES20.glClearColor(0, 0, 0, 1);
 219                 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 220
 221                 /* Setup projection matricies */
 222                 GLES20.glUniformMatrix4fv(this.viewHandle, 1, false, this.view, 0);
 223                 GLES20.glUniformMatrix4fv(this.projHandle, 1, false, this.proj, 0);
 224
 225                 /* Setup buffers objects */
 226                 GLES20.glEnableVertexAttribArray(this.vertHandle);
 227                 GLES20.glEnableVertexAttribArray(this.mapHandle);
 228
 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);
 235
 236                 /* Draw objects */
 237                 this.drawTable();
 238                 this.drawPile();
 239                 this.drawHand();
 240                 this.drawPick();
 241         }
 242
 243         @Override
 244         public void onSurfaceChanged(GL10 unused, int width, int height)
 245         {
 246                 Os.debug("Cards: onSurfaceChanged");
 247
 248                 GLES20.glViewport(0, 0, width, height);
 249
 250                 Matrix.setIdentityM(this.model, 0);
 251                 Matrix.setIdentityM(this.view, 0);
 252                 Matrix.setIdentityM(this.proj, 0);
 253
 254                 // Setup camera
 255                 float xang = 0.5f;
 256                 float yang = xang * ((float)height / (float)width);
 257
 258                 Matrix.frustumM(this.proj, 0,
 259                                 -1E-6f * xang, // left
 260                                 1E-6f  * xang, // right
 261                                 -1E-6f * yang, // bottom
 262                                 1E-6f  * yang, // top
 263                                 1E-6f,         // near
 264                                 10f);          // far
 265
 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);
 269         }
 270
 271         @Override
 272         public boolean onTouchEvent(MotionEvent event)
 273         {
 274                 boolean up = event.getActionMasked() == MotionEvent.ACTION_UP;
 275
 276                 float x =    event.getX() / this.getWidth();
 277                 float y = 1-(event.getY() / this.getHeight());
 278
 279                 this.ypos = y;
 280                 if (y < this.ylim) {
 281                         int num = this.hand.length;
 282                         this.xpos = x;
 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;
 286                 }
 287                 if (y < this.ylim && !this.drag) {
 288                         //Os.debug("Cards: onTouchEvent - starting drag");
 289                         this.drag = true;
 290                 }
 291                 if (this.drag) {
 292                         //Os.debug("Cards: onTouchEvent - move " + x + "," + y);
 293                         this.requestRender();
 294                 }
 295                 if (y >= this.ylim && this.drag && up) {
 296                         //Os.debug("Cards: onTouchEvent - playing card");
 297                         this.game.onPlay(this.hand[this.pick]);
 298                 }
 299                 if (up) {
 300                         //Os.debug("Cards: onTouchEvent - ending drag");
 301                         this.drag = false;
 302                 }
 303                 return true;
 304         }
 305
 306         /* Private loading methods */
 307         private int loadShader(int type, String code)
 308         {
 309                 Os.debug("Cards: loadShader");
 310
 311                 int shader = GLES20.glCreateShader(type);
 312                 GLES20.glShaderSource(shader, code);
 313                 GLES20.glCompileShader(shader);
 314                 return shader;
 315         }
 316
 317         private int loadTexture(String name)
 318         {
 319                 //Os.debug("Cards: loadTexture - " + name);
 320
 321                 final int[] tex = new int[1];
 322
 323                 /* Lookup the resource ID */
 324                 int id = 0;
 325                 try {
 326                         id = R.drawable.class.getField(name).getInt(null);
 327                 } catch(Exception e) {
 328                         Os.debug("Cards: lookup failed for '" + name + "'", e);
 329                         return 0;
 330                 }
 331
 332                 /* Load the bitmap */
 333                 Bitmap bitmap = BitmapFactory.decodeResource(this.res, id);
 334
 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_NEAREST);
 340                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 341
 342                 return tex[0];
 343         }
 344
 345         private FloatBuffer loadBuffer(float[] data)
 346         {
 347                 ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
 348                 bytes.order(ByteOrder.nativeOrder());
 349
 350                 FloatBuffer buf = bytes.asFloatBuffer();
 351                 buf.put(data);
 352                 buf.position(0);
 353
 354                 return buf;
 355         }
 356
 357         /* Private drawing methods */
 358         private void drawTable()
 359         {
 360                 /* Setup view */
 361                 Matrix.setIdentityM(this.model, 0);
 362                 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 363
 364                 /* Draw table */
 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);
 369         }
 370
 371         private void drawPile()
 372         {
 373                 /* Draw played cards */
 374                 for (int i = 0; i < 4; i++) {
 375                         if (i >= this.pile.length || this.pile[i] == null)
 376                                 continue;
 377
 378                         float ang = i * 90f;
 379
 380                         Matrix.setIdentityM(this.model, 0);
 381
 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);
 386
 387                         this.drawCard(this.pile[i]);
 388                 }
 389         }
 390
 391         private void drawHand()
 392         {
 393                 /* Draw hand */
 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)
 397                                 continue;
 398
 399                         Matrix.setIdentityM(this.model, 0);
 400
 401                         Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
 402                         Matrix.translateM(this.model, 0, 0f, -0.3f, 1.20f);
 403
 404                         if (this.drag) {
 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);
 409                                 float fcn = 0.1f
 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);
 413                         }
 414
 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);
 420
 421                         this.drawCard(this.hand[i]);
 422                 }
 423         }
 424
 425         private void drawPick()
 426         {
 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]);
 433                 }
 434         }
 435
 436         private void drawCard(String name)
 437         {
 438                 int idx   = this.index.get(name);
 439                 int front = this.face[idx];
 440                 int back  = this.red;
 441
 442                 /* Set model matrix */
 443                 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 444
 445                 /* Draw front */
 446                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.faceBuf);
 447                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 448                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, front);
 449                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 450
 451                 /* Draw back */
 452                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.backBuf);
 453                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 454                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, back);
 455                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 456         }
 457 }