Area Ship::bounding() const { // the idea in the following code is to calculate a bounding box // around the ship's triangle and use it for collision detection. // TODO: find a nicer way of rotating and translating // (-center_ and +center_ is not intuitive) // first calculate the triangle 'shadowing' the triangle on display // this means a rotation and translation needs to be applied to the // known points (see Ship::draw for comparison to the OpenGL code) const vector2 &RA = A_ - center_, &RB = B_ - center_, &RC = C_ - center_; // this is probably inefficient vector2 RRA(0, 0), RRB(0, 0), RRC(0, 0); float ra = to_radians(rot_angle_); rotate_vector(RA, ra, RRA); rotate_vector(RB, ra, RRB); rotate_vector(RC, ra, RRC); RRA += pos_ + center_; RRB += pos_ + center_; RRC += pos_ + center_; const vector2* points[3] = { &RRA, &RRB, &RRC } ; // no point storing the bounding box, because it depends on position // find a bounding box encompassing all points return Area::minimumArea(points, 3); }
/* ** Opcode 0xDD/0xFD ** IX/IY related instructions */ UBYTE Z80::indexInstructions(UWORD& I, UBYTE origOpcode) { UBYTE opcode = READ_MEM(PC++); switch (opcode) { case 0x8E: ADD8(A, READ_MEM(I + READ_MEM(PC++)), F_C); return 19; case 0x86: ADD8(A, READ_MEM(I + READ_MEM(PC++)), 0); return 19; case 0x09: ADD16(I, BC); return 15; case 0x19: ADD16(I, DE); return 15; case 0x29: ADD16(I, I); return 15; case 0x39: ADD16(I, SP); return 15; case 0xA6: AND(A, READ_MEM(I + READ_MEM(PC++))); return 19; case 0xBE: CP(A, READ_MEM(I + READ_MEM(PC++))); return 19; case 0x96: SUB8(A, READ_MEM(I + READ_MEM(PC++)), 0); return 19; case 0xAE: XOR(A, READ_MEM(I + READ_MEM(PC++))); return 19; case 0x35: { UBYTE v = I + READ_MEM(PC++); UBYTE s = READ_MEM(v); DEC8(s); WRITE_MEM(v, s); } return 23; case 0x2B: DEC16(I); return 10; case 0xE3: { UWORD s = READ_MEM16(SP); EX(s, I); WRITE_MEM16(SP, s); } return 23; case 0x23: INC16(I); return 10; case 0x34: { UBYTE v = I + READ_MEM(PC++); UBYTE s = READ_MEM(v); INC8(s); WRITE_MEM(v, s); } return 23; /* JP */ case 0xE9: PC = READ_MEM16(I); return 8; /* LD */ case 0x7E: A = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x46: B = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x4E: C = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x56: D = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x5E: E = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x66: H = READ_MEM(I + READ_MEM(PC++)); return 19; case 0x6E: L = READ_MEM(I + READ_MEM(PC++)); return 19; case 0xF9: SP = I; return 19; case 0x2A: I = READ_MEM16(READ_MEM16(PC)); PC += 2; return 20; case 0x21: I = READ_MEM16(PC); PC += 2; return 14; case 0x22: WRITE_MEM16(READ_MEM16(PC), I); PC += 2; return 20; case 0x70 + 7: WRITE_MEM(I + READ_MEM(PC++), A); return 19; case 0x70 + 0: WRITE_MEM(I + READ_MEM(PC++), B); return 19; case 0x70 + 1: WRITE_MEM(I + READ_MEM(PC++), C); return 19; case 0x70 + 2: WRITE_MEM(I + READ_MEM(PC++), D); return 19; case 0x70 + 3: WRITE_MEM(I + READ_MEM(PC++), E); return 19; case 0x70 + 4: WRITE_MEM(I + READ_MEM(PC++), H); return 19; case 0x70 + 5: WRITE_MEM(I + READ_MEM(PC++), L); return 19; case 0x36: WRITE_MEM(I + READ_MEM(PC), READ_MEM(PC + 1)); PC += 2; return 19; case 0xB6: OR(A, READ_MEM(I + READ_MEM(PC++))); return 19; case 0xE1: I = pop16(); return 14; case 0xE5: push16(I); return 15; case 0x9E: SUB8(A, READ_MEM(I + READ_MEM(PC++)), F_C); return 19; case 0xCB: { // DD CB UBYTE arg = READ_MEM(PC++); UBYTE extOpcode = READ_MEM(PC++); switch (extOpcode) { #define RES_I(b) case 0x86 + 8 * b: { UBYTE s = READ_MEM(I + arg); \ RES(s, b); WRITE_MEM(I + arg, s); } return 23; #define SET_I(b) case 0xC6 + 8 * b: { UBYTE s = READ_MEM(I + arg); \ SET(s, b); WRITE_MEM(I + arg, s); } return 23; #define BIT_I(b) case 0x46 + 8 * b: { UBYTE s = READ_MEM(I + arg); \ BIT(s, b); WRITE_MEM(I + arg, s); } return 23; /* BIT b,(I+N) */ BIT_I(0); BIT_I(1); BIT_I(2); BIT_I(3); BIT_I(4); BIT_I(5); BIT_I(6); BIT_I(7); /* RES b,(I+N) */ RES_I(0); RES_I(1); RES_I(2); RES_I(3); RES_I(4); RES_I(5); RES_I(6); RES_I(7); /* SET b,(I+N) */ SET_I(0); SET_I(1); SET_I(2); SET_I(3); SET_I(4); SET_I(5); SET_I(6); SET_I(7); case 0x16: { /* RL (I+N) */ UBYTE s = READ_MEM(I + arg); RL(s); WRITE_MEM(I + arg, s); } return 23; case 0x06: { /* RLC (I+N) */ UBYTE s = READ_MEM(I + arg); RLC(s); WRITE_MEM(I + arg, s); } return 23; case 0x1E: { /* RR (I+N) */ UBYTE s = READ_MEM(I + arg); RR(s); WRITE_MEM(I + arg, s); } return 23; case 0x0E: { /* RRC (I+N) */ UBYTE s = READ_MEM(I + arg); RRC(s); WRITE_MEM(I + arg, s); } return 23; case 0x26: { /* SLA (I+N) */ UBYTE s = READ_MEM(I + arg); SLA(s); WRITE_MEM(I + arg, s); } return 23; case 0x2E: { /* SRA (I+N) */ UBYTE s = READ_MEM(I + arg); SRA(s); WRITE_MEM(I + arg, s); } return 23; case 0x36: { /* SLL (I+N) */ UBYTE s = READ_MEM(I + arg); SLL(s); WRITE_MEM(I + arg, s); } return 23; case 0x3E: { /* SRL (I+N) */ UBYTE s = READ_MEM(I + arg); SRL(s); WRITE_MEM(I + arg, s); } return 23; default: std::cout << std::hex << "Unknown extended opcode (" << origOpcode << ":" << opcode << "): " << static_cast<int>(extOpcode) << std::endl; return 0; } } break; default: std::cout << std::hex << "Unknown extended opcode (" << origOpcode << "): " << static_cast<int>(opcode) << std::endl; break; } return 0; }