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Enemy.d

/*
 * $Id: Enemy.d,v 1.2 2003/09/21 04:01:27 kenta Exp $
 *
 * Copyright 2003 Kenta Cho. All rights reserved.
 */
module abagames.a7xpg.Enemy;

import math;
import opengl;
import abagames.util.Vector;
import abagames.util.Rand;
import abagames.util.ActorInitializer;
import abagames.a7xpg.LuminousActor;
import abagames.a7xpg.Ship;
import abagames.a7xpg.A7xGameManager;
import abagames.a7xpg.A7xScreen;

/**
 * Enemies.
 */
00021 public class Enemy: LuminousActor {
 private:
  static int displayListIdx;
  Ship ship;
  Field field;
  Rand rand;
  A7xGameManager manager;
  Vector pos, ppos;
  int type;
  float size, speed;
  float deg;
  int cnt;
  float turnDist;
  bool hitWall;
  int hitWallType;
  int chaseType;
  Vector vel, blowedVel;
  float armDeg, armDegMv;
  static const int POSITION_HISTORY_LENGTH = 180;
  Vector[] posHst;
  float[] degHst;
  int posHstIdx;
  const int APPEAR_CNT = 60;
  const int DESTROYED_CNT = 120;

  public override Actor newActor() {
    return new Enemy;
  }

  public override void init(ActorInitializer ini) {
    EnemyInitializer ei = (EnemyInitializer) ini;
    ship = ei.ship;
    field = ei.field;
    rand = ei.rand;
    manager = ei.manager;
    pos = new Vector;
    ppos = new Vector;
    vel = new Vector;
    blowedVel = new Vector;
    posHst = new Vector[POSITION_HISTORY_LENGTH];
    degHst = new float[POSITION_HISTORY_LENGTH];
    for (int i = 0; i < POSITION_HISTORY_LENGTH; i++) {
      posHst[i] = new Vector;
    }
  }

  public void set(int type, float size, float speed) {
    this.type = type;
    this.size = size;
    this.speed = speed;
    set();
  }

  private void set() {
    for (int i = 0; i < 8 ; i++) {
      pos.x = rand.nextFloat((field.size.x - size) * 2) - field.size.x + size;
      pos.y = rand.nextFloat((field.size.y - size) * 2) - field.size.y + size;
      if (pos.dist(ship.pos) > 8)
      break;
      if (i == 7) {
      pos.x = 0;
      pos.y = 0;
      }
    }
    ppos.x = pos.x; ppos.y = pos.y;
    blowedVel.x = blowedVel.y = 0;
    cnt = 0;
    turnDist = 0;
    isExist = true;
    switch (type) {
    case 0:
      deg = math.PI / 2 * rand.nextInt(4);
      break;
    case 1:
      deg = math.PI / 4 * rand.nextInt(8);
      break;
    case 2:
      chaseType = 0;
      deg = math.PI / 2 * rand.nextInt(4);
      break;
    case 3:
      vel.x = vel.y = 0;
      deg = rand.nextFloat(math.PI * 2);
      break;
    case 4:
      deg = rand.nextFloat(math.PI * 2);
      vel.x = sin(deg) * speed;
      vel.y = cos(deg) * speed;
      armDeg = rand.nextFloat(math.PI * 2);
      if (rand.nextInt(2) == 0) 
      armDegMv = rand.nextFloat(0.01) + 0.02;
      else
      armDegMv = -rand.nextFloat(0.01) - 0.02;
      break;
    case 5:
      posHstIdx = POSITION_HISTORY_LENGTH;
      deg = math.PI / 2 * rand.nextInt(4);
      for (int i = 0; i < POSITION_HISTORY_LENGTH; i++) {
      posHst[i].x = pos.x;
      posHst[i].y = pos.y;
      degHst[i] = deg;
      }
      break;
    default:
      break;
    }
  }

  private float[][] enemyColor = 
    [
     [0.9, 0.2, 0.2],
     [0.7, 0.3, 0.6],
     [0.6, 0.7, 0.2],
     [0.8, 0.2, 0.4],
     [0.5, 0.7, 0.3],
     [0.6, 0.3, 0.8],
     ];

  private void hitShip() {
    if (ship.invincible) {
      manager.playSe(6);
      for (int i = 0; i < 60; i++) {
      manager.addParticle(pos, rand.nextFloat(math.PI * 2), size, rand.nextFloat(0.5),
                      enemyColor[type][0], enemyColor[type][1], enemyColor[type][2]);
      }
      ship.destroyEnemy();
      set();
      cnt = -DESTROYED_CNT;
    } else if (!ship.restart) {
      for (int i = 0; i < 100; i++) {
      manager.addParticle(pos, rand.nextFloat(math.PI * 2), size, rand.nextFloat(1),
                      0.3, 1, 0.2);
      }
      ship.miss();
      manager.restartStage();
    }
  }

  private void moveType0() {
    turnDist -= speed;
    if (hitWall) {
      turnDist = (rand.nextInt(60) + 60) * 0.2;
      if (deg < math.PI / 4 * 1 || (deg > math.PI / 4 * 3 && deg < math.PI / 4 * 5)) {
      if (ship.pos.x < pos.x)
        deg = math.PI / 4 * 6;
      else 
        deg = math.PI / 4 * 2;
      } else {
      if (ship.pos.y < pos.y)
        deg = math.PI / 4 * 4;
      else 
        deg = math.PI / 4 * 0;
      }
    }
    if (cnt < APPEAR_CNT)
      return;
    if (turnDist <= 0) {
      turnDist = (rand.nextInt(90) + 60) * 0.2;
      float od = atan2(ship.pos.x - pos.x, ship.pos.y - pos.y);
      if (od < -math.PI / 4 * 3) 
      deg = math.PI / 4 * 4;
      else if (od < -math.PI / 4 * 1) 
      deg = math.PI / 4 * 6;
      else if (od < math.PI / 4 * 1) 
      deg = math.PI / 4 * 0;
      else 
      deg = math.PI / 4 * 2;
    }
    if (rand.nextInt(9) == 0) {
      manager.addParticle(pos, deg + math.PI + math.PI / 7 + rand.nextFloat(0.2) - 0.1, 
                    size, speed * 2, 0.9, 0.3, 0.3);
    }
    if (rand.nextInt(9) == 0) {
      manager.addParticle(pos, deg + math.PI - math.PI / 7 + rand.nextFloat(0.2) - 0.1, 
                    size, speed * 2, 0.9, 0.3, 0.3);
    }
    if (ship.checkHit(pos.x, pos.y - size * 0.8, pos.x, pos.y + size * 0.8) ||
      ship.checkHit(pos.x - size * 0.8, pos.y, pos.x + size * 0.8, pos.y)) {
      hitShip();
    }
  }

  private void moveType1() {
    turnDist -= speed;
    if (hitWall) {
      deg += math.PI;
      if (deg >= math.PI * 2)
      deg -= math.PI * 2;
    }
    if (cnt < APPEAR_CNT)
      return;
    if (!hitWall && turnDist <= 0) {
      turnDist = (rand.nextInt(40) + 8) * 0.2;
      float od = atan2(ship.pos.x - pos.x, ship.pos.y - pos.y);
      if (od < 0)
      od += math.PI * 2;
      od -= deg;
      if (od > -math.PI / 8 && od < math.PI / 8) {
      } else if (od < -math.PI / 8 * 15 || od > math.PI / 8 * 15) {
      } else if ((od > -math.PI && od < 0) || od > math.PI) {
      deg -= math.PI / 4;
      if (deg < 0)
        deg += math.PI * 2;
      } else {
      deg += math.PI / 4;
      if (deg >= math.PI * 2)
        deg -= math.PI * 2;
      }
    }
    if (rand.nextInt(4) == 0) {
      manager.addParticle(pos, deg + math.PI + rand.nextFloat(0.2) - 0.1, 
                    size, speed * 2.5, 0.8, 0.4, 0.5);
    }
    if (ship.checkHit(pos.x, pos.y - size * 0.8, pos.x, pos.y + size * 0.8) ||
      ship.checkHit(pos.x - size * 0.8, pos.y, pos.x + size * 0.8, pos.y)) {
      hitShip();
    }
  }

  private void moveType2() {
    if (hitWall) {
      if ((hitWallType & 1) == 1) {
      float od = atan2(ship.pos.x - pos.x, ship.pos.y - pos.y);
      if (od > -math.PI / 2 && od <= math.PI / 2) {
        if (chaseType > 0)
          deg = 0;
        else
          deg = math.PI / 2 * 2;
        chaseType++;
      } else {
        if (chaseType > 0)
          deg = math.PI / 2 * 2;
        else
          deg = 0;
        chaseType++;
      }
      }
      if ((hitWallType & 2) == 2) {
      float od = atan2(ship.pos.x - pos.x, ship.pos.y - pos.y);
      if (od < 0) {
        if (chaseType > 0)
          deg = math.PI / 2 * 3;
        else
          deg = math.PI / 2;
        chaseType++;
      } else {
        if (chaseType > 0)
          deg = math.PI / 2;
        else
          deg = math.PI / 2 * 3;
        chaseType++;
      }
      }
    } else if (chaseType > 1) {
      if (deg < 0.1) {
      if (ship.pos.y <= pos.y) {
        if (ship.pos.x < pos.x)
          deg = math.PI / 2 * 3;
        else
          deg = math.PI / 2;
        chaseType = 0;
      }
      } else if (deg > math.PI / 2 - 0.1 && deg < math.PI / 2 + 0.1) {
      if (ship.pos.x <= pos.x) {
        if (ship.pos.y < pos.y)
          deg = math.PI / 2 * 2;
        else
          deg = 0;
        chaseType = 0;
      }
      } else if (deg > math.PI / 2 * 2 - 0.1 && deg < math.PI / 2 * 2 + 0.1) {
      if (ship.pos.y >= pos.y) {
        if (ship.pos.x < pos.x)
          deg = math.PI / 2 * 3;
        else
          deg = math.PI / 2;
        chaseType = 0;
      }
      } else if (deg > math.PI / 2 * 3 - 0.1 && deg < math.PI / 2 * 3 + 0.1) {
      if (ship.pos.x >= pos.x) {
        if (ship.pos.y < pos.y)
          deg = math.PI / 2 * 2;
        else
          deg = 0;
        chaseType = 0;
      }
      }
    }
    if (cnt < APPEAR_CNT)
      return;
    if (rand.nextInt(9) == 0) {
      manager.addParticle(pos, deg + math.PI + math.PI / 12 + rand.nextFloat(0.2) - 0.1, 
                    size, speed * 2, 0.3, 0.9, 0.3);
    }
    if (rand.nextInt(9) == 0) {
      manager.addParticle(pos, deg + math.PI - math.PI / 12 + rand.nextFloat(0.2) - 0.1, 
                    size, speed * 2, 0.3, 0.9, 0.3);
    }
    if (ship.checkHit(pos.x, pos.y - size * 0.8, pos.x, pos.y + size * 0.8) ||
      ship.checkHit(pos.x - size * 0.8, pos.y, pos.x + size * 0.8, pos.y)) {
      hitShip();
    }
  }

  private void moveType3() {
    if (hitWall) {
      if ((hitWallType & 1) == 1) {
      vel.x *= -0.8;
      }
      if ((hitWallType & 2) == 2) {
      vel.y *= -0.8;
      }
    } else {
      if (ship.pos.x < pos.x) {
      vel.x -= 0.01;
      } else {
      vel.x += 0.01;
      }
      if (ship.pos.y < pos.y) {
      vel.y -= 0.01;
      } else {
      vel.y += 0.01;
      }
    }
    vel.mul(0.99);
    deg += 0.1;
    if (cnt < APPEAR_CNT)
      return;
    if (rand.nextInt(4) == 0) {
      manager.addParticle(pos, rand.nextFloat(math.PI * 2), 
                    size, speed, 0.9, 0.3, 0.6);
    }
    if (ship.checkHit(pos.x, pos.y - size * 0.8, pos.x, pos.y + size * 0.8) ||
      ship.checkHit(pos.x - size * 0.8, pos.y, pos.x + size * 0.8, pos.y)) {
      hitShip();
    }
  }

  private void moveType4() {
    float width = size * sin(armDeg);
    float height = size * cos(armDeg);
    if (width < 0)
      width *= -1;
    if (height < 0)
      height *= -1;
    if (pos.x < -field.size.x + width && vel.x < 0) {
      vel.x *= -1;
      pos.x = ppos.x; pos.y = ppos.y;
    } else if (pos.x > field.size.x - width && vel.x > 0) {
      vel.x *= -1;
      pos.x = ppos.x; pos.y = ppos.y;
    }
    if (pos.y < -field.size.y + height && vel.y < 0) {
      vel.y *= -1;
      pos.x = ppos.x; pos.y = ppos.y;
    } else if (pos.y > field.size.y - height && vel.y > 0) {
      vel.y *= -1;
      pos.x = ppos.x; pos.y = ppos.y;
    }
    armDeg += armDegMv;
    if (cnt < APPEAR_CNT)
      return;
    if (rand.nextInt(7) == 0) {
      manager.addParticle(pos, armDeg + rand.nextFloat(0.2) - 0.1, 
                    1, speed * 2, 0.5, 0.9, 0.3);
    }
    if (rand.nextInt(7) == 0) {
      manager.addParticle(pos, armDeg + math.PI + rand.nextFloat(0.2) - 0.1, 
                    1, speed * 2, 0.5, 0.9, 0.3);
    }
    float ax = size * sin(armDeg) * 0.9;
    float ay = size * cos(armDeg) * 0.9;
    if (ship.checkHit(pos.x - ax, pos.y - ay, pos.x + ax, pos.y + ay)) {
      hitShip();
    }
  }

  private void moveType5() {
    turnDist -= speed;
    if (hitWall) {
      deg += math.PI;
      if (deg >= math.PI * 2)
      deg -= math.PI * 2;
    } 
    if (cnt < APPEAR_CNT)
      return;
    if (!hitWall && turnDist <= 0) {
      turnDist = (rand.nextInt(24) + 16) * 0.2;
      float od = atan2(ship.pos.x - pos.x, ship.pos.y - pos.y);
      if (od < 0)
      od += math.PI * 2;
      od -= deg;
      if (od > -math.PI / 8 && od < math.PI / 8) {
      } else if (od < -math.PI / 8 * 15 || od > math.PI / 8 * 15) {
      } else if ((od > -math.PI && od < 0) || od > math.PI) {
      deg -= math.PI / 2;
      if (deg < 0)
        deg += math.PI * 2;
      } else {
      deg += math.PI / 2;
      if (deg >= math.PI * 2)
        deg -= math.PI * 2;
      }
    }
    if (rand.nextInt(4) == 0) {
      manager.addParticle(pos, deg + math.PI + rand.nextFloat(0.2) - 0.1, 
                    0, speed * 5, 0.5, 0.3, 0.9);
    }
    int hi = posHstIdx;
    for (int i = 0; i < 5; i++) {
      float cx = posHst[hi].x;
      float cy = posHst[hi].y;
      float cd = degHst[hi];
      float ax = size * sin(cd);
      float ay = size * cos(cd);
      if (ship.checkHit(cx - ax, cy - ay, cx + ax, cy + ay)) {
      hitShip();
      }
      hi += size * 2 / speed;
      if (hi >= POSITION_HISTORY_LENGTH)
      hi -= POSITION_HISTORY_LENGTH;
    }
  }

  public override void move() {
    cnt++;
    if (cnt < 0)
      return;
    ppos.x = pos.x; ppos.y = pos.y;
    switch (type) {
    default:
      pos.x += sin(deg) * speed;
      pos.y += cos(deg) * speed;
      break;
    case 3:
    case 4:
      pos.x += vel.x * speed;
      pos.y += vel.y * speed;
      break;
    }
    if (type < 4) {
      ship.addBlowedForce(pos, blowedVel, size);
      pos.x += blowedVel.x;
      pos.y += blowedVel.y;
      blowedVel.mul(0.94);
    }
    if (type == 5) {
      posHstIdx--;
      if (posHstIdx < 0)
      posHstIdx = POSITION_HISTORY_LENGTH - 1;
      posHst[posHstIdx].x = pos.x;
      posHst[posHstIdx].y = pos.y;
      degHst[posHstIdx] = deg;
    }
    hitWallType = 0;
    if (pos.x < -field.size.x + size || pos.x > field.size.x - size ) {
      hitWall = true;
      hitWallType |= 1;
    }
    if (pos.y < -field.size.y + size || pos.y > field.size.y - size) {
      hitWall = true;
      hitWallType |= 2;
    }
    if (hitWall) {
      if (type < 4) {
      blowedVel.mul(-0.7);
      }
      if (type != 4) { 
      pos.x = ppos.x; pos.y = ppos.y;
      }
    }
    switch (type) {
    case 0:
      moveType0();
      break;
    case 1:
      moveType1();
      break;
    case 2:
      moveType2();
      break;
    case 3:
      moveType3();
      break;
    case 4:
      moveType4();
      break;
    case 5:
      moveType5();
      break;
    default:
      break;
    }
    hitWall = false;
  }

  private void drawType0() {
    float sz;
    if (cnt < 0)
      return;
    else if (cnt < APPEAR_CNT)
      sz = size * cnt / APPEAR_CNT;
    else
      sz = size;
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glRotatef(-deg * 180 / math.PI, 0, 0, 1);
    glScalef(sz, sz, sz);
    glCallList(displayListIdx + type * 3);
    glCallList(displayListIdx + type * 3 + 1);
    glTranslatef(0, 0, -0.5);
    glScalef(1, 1, -1);
    glCallList(displayListIdx + type * 3 + 2);
    glPopMatrix();
  }

  private void drawType4() {
    if (cnt < 0)
      return;
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glCallList(displayListIdx + type * 3);
    glCallList(displayListIdx + type * 3 + 1);
    glTranslatef(0, 0, -0.5);
    glScalef(1, 1, -1);
    glCallList(displayListIdx + type * 3 + 2);
    glPopMatrix();
  }

  private void drawArm() {
    float sz;
    if (cnt < 0)
      return;
    else if (cnt < APPEAR_CNT)
      sz = size * cnt / APPEAR_CNT;
    else
      sz = size;
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glRotatef(-armDeg * 180 / math.PI, 0, 0, 1);
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.7, 0.9, 0.3, 0.3);
    glVertex3f(0, 0, 0.5);
    A7xScreen.setColor(0.7, 0.9, 0.3, 0.9);
    glVertex3f(-0.5, 0, 0.5);
    glVertex3f(0, sz, 0.5);
    glVertex3f(0.5, 0, 0.5);
    glVertex3f(0, -sz, 0.5);
    glEnd();
    glTranslatef(0, 0, -0.5);
    glScalef(1, 1, -1);
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.7, 0.9, 0.3, 0.1);
    glVertex3f(0, 0, 0.5);
    A7xScreen.setColor(0.7, 0.9, 0.3, 0.5);
    glVertex3f(-0.5, 0, 0.5);
    glVertex3f(0, sz, 0.5);
    glVertex3f(0.5, 0, 0.5);
    glVertex3f(0, -sz, 0.5);
    glEnd();
    glPopMatrix();
  }

  private void drawType5() {
    float sz;
    if (cnt < 0)
      return;
    else if (cnt < APPEAR_CNT)
      sz = size * cnt / APPEAR_CNT;
    else
      sz = size;
    int hi = posHstIdx;
    for (int i = 0; i < 5; i++) {
      glPushMatrix();
      glTranslatef(posHst[hi].x, posHst[hi].y, 0.5);
      glRotatef(-degHst[hi] * 180 / math.PI, 0, 0, 1);
      glScalef(sz, sz, sz);
      glCallList(displayListIdx + 5 * 3);
      glCallList(displayListIdx + 5 * 3 + 1);
      glTranslatef(0, 0, -0.5);
      glScalef(1, 1, -1);
      glCallList(displayListIdx + 5 * 3 + 2);
      glPopMatrix();
      hi += size * 2 / speed;
      if (hi >= POSITION_HISTORY_LENGTH)
      hi -= POSITION_HISTORY_LENGTH;
    }
  }

  public override void draw() {
    switch (type) {
    case 4:
      drawType4();
      drawArm();
      break;
    case 5:
      drawType5();
      break;
    default:
      drawType0();
      break;
    }
  }

  private void drawType0Luminous() {
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glRotatef(-deg * 180 / math.PI, 0, 0, 1);
    glScalef(size, size, size);
    glCallList(displayListIdx + type * 3 + 1);
    glPopMatrix();
  }

  private void drawType4Luminous() {
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glCallList(displayListIdx + type * 3 + 1);
    glPopMatrix();
  }

  private void drawArmLuminous() {
    glPushMatrix();
    glTranslatef(pos.x, pos.y, 0.5);
    glRotatef(-armDeg * 180 / math.PI, 0, 0, 1);
    glBegin(GL_LINE_STRIP);
    A7xScreen.setColor(0.5, 0.9, 0.3, 0.9);
    glVertex3f(-0.5, 0, 0.5);
    glVertex3f(0, size, 0.5);
    glVertex3f(0.5, 0, 0.5);
    glVertex3f(0, -size, 0.5);
    glVertex3f(-0.5, 0, 0.5);
    glEnd();
    glPopMatrix();
  }

  private void drawType5Luminous() {
  }

  public override void drawLuminous() {
    if (cnt < APPEAR_CNT)
      return;
    switch (type) {
    case 4:
      drawType4Luminous();
      drawArmLuminous();
      break;
    case 5:
      drawType5Luminous();
      break;
    default:
      drawType0Luminous();
      break;
    }
  }

  // Create display lists.

  public static void createDisplayLists() {
    displayListIdx = glGenLists(18);
    glNewList(displayListIdx, GL_COMPILE);
    drawEnemyType0(1);
    glEndList();
    glNewList(displayListIdx + 1, GL_COMPILE);
    drawEnemyType0Line(1);
    glEndList();
    glNewList(displayListIdx + 2, GL_COMPILE);
    drawEnemyType0(0.6);
    glEndList();
    glNewList(displayListIdx + 3, GL_COMPILE);
    drawEnemyType1(1);
    glEndList();
    glNewList(displayListIdx + 4, GL_COMPILE);
    drawEnemyType1Line(1);
    glEndList();
    glNewList(displayListIdx + 5, GL_COMPILE);
    drawEnemyType1(0.6);
    glEndList();
    glNewList(displayListIdx + 6, GL_COMPILE);
    drawEnemyType2(1);
    glEndList();
    glNewList(displayListIdx + 7, GL_COMPILE);
    drawEnemyType2Line(1);
    glEndList();
    glNewList(displayListIdx + 8, GL_COMPILE);
    drawEnemyType2(0.6);
    glEndList();
    glNewList(displayListIdx + 9, GL_COMPILE);
    drawEnemyType3(1);
    glEndList();
    glNewList(displayListIdx + 10, GL_COMPILE);
    drawEnemyType3Line(1);
    glEndList();
    glNewList(displayListIdx + 11, GL_COMPILE);
    drawEnemyType3(0.6);
    glEndList();
    glNewList(displayListIdx + 12, GL_COMPILE);
    drawEnemyType4(1);
    glEndList();
    glNewList(displayListIdx + 13, GL_COMPILE);
    drawEnemyType4Line(1);
    glEndList();
    glNewList(displayListIdx + 14, GL_COMPILE);
    drawEnemyType4(0.6);
    glEndList();
    glNewList(displayListIdx + 15, GL_COMPILE);
    drawEnemyType5(1);
    glEndList();
    glNewList(displayListIdx + 16, GL_COMPILE);
    drawEnemyType5Line(1);
    glEndList();
    glNewList(displayListIdx + 17, GL_COMPILE);
    drawEnemyType5(0.6);
    glEndList();
  }

  public static void deleteDisplayLists() {
    glDeleteLists(displayListIdx, 18);
  }

  private static void drawEnemyType0(float alpha) {
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.9, 0.7, 0.4, 0.9 * alpha);
    glVertex3f(0.8, 1, 0.2);
    A7xScreen.setColor(1, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(1, -1, 0);
    glVertex3f(0.7, -0.8, 0.8);
    glVertex3f(0, 1, 0.2);
    glEnd();
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.9, 0.7, 0.4, 0.9 * alpha);
    glVertex3f(-0.8, 1, 0.2);
    A7xScreen.setColor(1, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(-1, -1, 0);
    glVertex3f(-0.7, -0.8, 0.8);
    glVertex3f(0, 1, 0.2);
    glEnd();
  }

  private static void drawEnemyType0Line(float alpha) {
    glBegin(GL_LINE_STRIP);
    A7xScreen.setColor(0.9, 0.2, 0.2, 1 * alpha);
    glVertex3f(0.7, -0.8, 0.8);
    glVertex3f(0.8, 1, 0.2);
    glVertex3f(-0.8, 1, 0.2);
    glVertex3f(-0.7, -0.8, 0.8);
    glEnd();
  }

  private static void drawEnemyType1(float alpha) {
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.7, 0.3, 0.6, 1.0 * alpha);
    glVertex3f(0, 1, 0.5);
    A7xScreen.setColor(0.5, 0.2, 0.7, 0.8 * alpha);
    glVertex3f(-0.5, -1, 0.2);
    glVertex3f(-0.8, -0.6, 0.6);
    glVertex3f(0, -0.3, 1);
    glVertex3f(0.8, -0.6, 0.6);
    glVertex3f(0.5, -1, 0.2);
    glEnd();
  }

  private static void drawEnemyType1Line(float alpha) {
    glBegin(GL_LINE_STRIP);
    A7xScreen.setColor(0.4, 0.2, 0.7, 1.0 * alpha);
    glVertex3f(-0.5, -1, 0.2);
    glVertex3f(-0.8, -0.6, 0.6);
    glVertex3f(0, -0.3, 1);
    glVertex3f(0.8, -0.6, 0.6);
    glVertex3f(0.5, -1, 0.2);
    glEnd();
  }

  private static void drawEnemyType2(float alpha) {
    glBegin(GL_TRIANGLE_STRIP);
    A7xScreen.setColor(0.6, 0.8, 0.2, 1.0 * alpha);
    glVertex3f(-0.3, -0.6, 1);
    A7xScreen.setColor(0.5, 0.8, 0.2, 0.5 * alpha);
    glVertex3f(0, 0.6, 0.7);
    glVertex3f(-0.9, 0.8, 0.4);
    A7xScreen.setColor(0.6, 0.8, 0.5, 1.0 * alpha);
    glVertex3f(-0.2, 0, 0);
    glEnd();
    glBegin(GL_TRIANGLE_STRIP);
    A7xScreen.setColor(0.6, 0.8, 0.2, 1.0 * alpha);
    glVertex3f(0.3, -0.6, 1);
    A7xScreen.setColor(0.5, 0.8, 0.2, 0.5 * alpha);
    glVertex3f(0, 0.6, 0.7);
    glVertex3f(0.9, 0.8, 0.4);
    A7xScreen.setColor(0.6, 0.8, 0.5, 1.0 * alpha);
    glVertex3f(0.2, 0, 0);
    glEnd();
  }

  private static void drawEnemyType2Line(float alpha) {
    A7xScreen.setColor(0.5, 1, 0.2, 1.0 * alpha);
    glBegin(GL_LINE_STRIP);
    glVertex3f(-0.9, 0.8, 0.4);
    glVertex3f(0, 0.6, 0.7);
    glVertex3f(0.9, 0.8, 0.4);
    glEnd();
  }

  private static void drawEnemyType3(float alpha) {
    glBegin(GL_TRIANGLE_STRIP);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(0, 1, 0.7);
    glVertex3f(0.8, 0.4, 0.7);
    A7xScreen.setColor(0.8, 0.1, 0.6, 0.6 * alpha);
    glVertex3f(0.6, 0.3, 0);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(0.8, -0.4, 0.7);
    glEnd();
    glBegin(GL_TRIANGLE_STRIP);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(0.8, -0.4, 0.7);
    glVertex3f(0, -1, 0.7);
    A7xScreen.setColor(0.8, 0.1, 0.6, 0.6 * alpha);
    glVertex3f(0, -0.7, 0);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(-0.8, -0.4, 0.7);
    glEnd();
    glBegin(GL_TRIANGLE_STRIP);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(-0.8, -0.4, 0.7);
    glVertex3f(-0.8, 0.4, 0.7);
    A7xScreen.setColor(0.8, 0.1, 0.6, 0.6 * alpha);
    glVertex3f(-0.6, 0.3, 0);
    A7xScreen.setColor(0.8, 0.2, 0.4, 0.9 * alpha);
    glVertex3f(0, 1, 0.7);
    glEnd();
  }

  private static void drawEnemyType3Line(float alpha) {
    A7xScreen.setColor(0.8, 0.2, 0.6, 0.9 * alpha);
    glBegin(GL_LINE_STRIP);
    glVertex3f(0, 1, 0.7);
    glVertex3f(0.6, 0.3, 0);
    glVertex3f(0.8, -0.4, 0.7);
    glVertex3f(0, -0.7, 0);
    glVertex3f(-0.8, -0.4, 0.7);
    glVertex3f(-0.6, 0.3, 0);
    glVertex3f(0, 1, 0.7);
    glEnd();
  }

  private static void drawEnemyType4(float alpha) {
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.5, 0.7, 0.3, 0.9 * alpha);
    glVertex3f(0, 0, 1);
    A7xScreen.setColor(0.5, 0.9, 0.3, 0.5 * alpha);
    glVertex3f(1, 0, 0.2);
    glVertex3f(0, 1, 0.2);
    glVertex3f(-1, 0, 0.2);
    glVertex3f(0, -1, 0.2);
    glVertex3f(1, 0, 0.2);
    glEnd();
  }

  private static void drawEnemyType4Line(float alpha) {
    A7xScreen.setColor(0.3, 0.8, 0.3, 0.9 * alpha);
    glBegin(GL_LINE_STRIP);
    glVertex3f(1, 0, 0.2);
    glVertex3f(0, 1, 0.2);
    glVertex3f(-1, 0, 0.2);
    glVertex3f(0, -1, 0.2);
    glVertex3f(1, 0, 0.2);
    glEnd();
  }

  private static void drawEnemyType5(float alpha) {
    glBegin(GL_TRIANGLE_FAN);
    A7xScreen.setColor(0.6, 0.3, 0.8, 0.9 * alpha);
    glVertex3f(0, 0.5, 1);
    A7xScreen.setColor(0.4, 0.3, 0.9, 0.6 * alpha);
    glVertex3f(-0.3, 1, 0.3);
    glVertex3f(0.3, 1, 0.3);
    glVertex3f(0.5, -1, 0.4);
    glVertex3f(-0.5, -1, 0.4);
    glVertex3f(-0.3, 1, 0.3);
    glEnd();
  }

  private static void drawEnemyType5Line(float alpha) {
    A7xScreen.setColor(0.4, 0.3, 0.9, 0.9 * alpha);
    glBegin(GL_LINE_STRIP);
    glVertex3f(-0.3, 1, 0.3);
    glVertex3f(0.3, 1, 0.3);
    glVertex3f(0.5, -1, 0.4);
    glVertex3f(-0.5, -1, 0.4);
    glVertex3f(-0.3, 1, 0.3);
    glEnd();
  }
}

public class EnemyInitializer: ActorInitializer {
 public:
  Ship ship;
  Field field;
  Rand rand;
  A7xGameManager manager;

  public this(Ship ship, Field field, Rand rand, A7xGameManager manager) {
    this.ship = ship;
    this.field = field;
    this.rand = rand;
    this.manager = manager;
  }
}

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