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Add atan2, which was conspicuously absent, to the VM
- DECORATE now has atan2(y,x) and VectorAngle(x,y) functions. They are identical except for the order of their parameters. The returned angle is in degrees (not radians).
This commit is contained in:
Randy Heit
parent
30a530b178
commit
e83bc53678
6 changed files with 135 additions and 0 deletions
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@ -296,6 +296,8 @@ xx(Tan)
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xx(CosH)
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xx(SinH)
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xx(TanH)
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xx(ATan2)
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xx(VectorAngle)
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xx(Alpha)
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xx(Angle)
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xx(Args)
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@ -56,6 +56,7 @@ static FxExpression *ParseRandom(FScanner &sc, FName identifier, PClassActor *cl
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static FxExpression *ParseRandomPick(FScanner &sc, FName identifier, PClassActor *cls);
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static FxExpression *ParseRandom2(FScanner &sc, PClassActor *cls);
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static FxExpression *ParseAbs(FScanner &sc, PClassActor *cls);
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static FxExpression *ParseAtan2(FScanner &sc, FName identifier, PClassActor *cls);
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static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cls);
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static FxExpression *ParseClamp(FScanner &sc, PClassActor *cls);
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@ -386,6 +387,9 @@ static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
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return ParseClamp(sc, cls);
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case NAME_Abs:
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return ParseAbs(sc, cls);
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case NAME_ATan2:
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case NAME_VectorAngle:
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return ParseAtan2(sc, identifier, cls);
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default:
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args = new FArgumentList;
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func = dyn_cast<PFunction>(cls->Symbols.FindSymbol(identifier, true));
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@ -511,6 +515,15 @@ static FxExpression *ParseAbs(FScanner &sc, PClassActor *cls)
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return new FxAbs(x);
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}
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static FxExpression *ParseAtan2(FScanner &sc, FName identifier, PClassActor *cls)
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{
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FxExpression *a = ParseExpressionM(sc, cls);
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sc.MustGetToken(',');
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FxExpression *b = ParseExpressionM(sc, cls);
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sc.MustGetToken(')');
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return identifier == NAME_ATan2 ? new FxATan2(a, b, sc) : new FxATan2(b, a, sc);
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}
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static FxExpression *ParseMinMax(FScanner &sc, FName identifier, PClassActor *cls)
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{
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TArray<FxExpression*> list;
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@ -623,6 +623,27 @@ public:
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//
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//==========================================================================
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class FxATan2 : public FxExpression
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{
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FxExpression *yval, *xval;
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public:
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FxATan2(FxExpression *y, FxExpression *x, const FScriptPosition &pos);
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~FxATan2();
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FxExpression *Resolve(FCompileContext&);
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ExpEmit Emit(VMFunctionBuilder *build);
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private:
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ExpEmit ToReg(VMFunctionBuilder *build, FxExpression *val);
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};
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//==========================================================================
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//
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//
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//
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//==========================================================================
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class FxMinMax : public FxExpression
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{
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TDeletingArray<FxExpression *> choices;
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@ -1991,6 +1991,99 @@ ExpEmit FxAbs::Emit(VMFunctionBuilder *build)
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return out;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxATan2::FxATan2(FxExpression *y, FxExpression *x, const FScriptPosition &pos)
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: FxExpression(pos)
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{
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yval = y;
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xval = x;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxATan2::~FxATan2()
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{
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SAFE_DELETE(yval);
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SAFE_DELETE(xval);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FxExpression *FxATan2::Resolve(FCompileContext &ctx)
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{
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CHECKRESOLVED();
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SAFE_RESOLVE(yval, ctx);
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SAFE_RESOLVE(xval, ctx);
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if (!yval->IsNumeric() || !xval->IsNumeric())
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{
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ScriptPosition.Message(MSG_ERROR, "numeric value expected for parameter");
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delete this;
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return NULL;
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}
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if (yval->isConstant() && xval->isConstant())
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{
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double y = static_cast<FxConstant *>(yval)->GetValue().GetFloat();
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double x = static_cast<FxConstant *>(xval)->GetValue().GetFloat();
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FxExpression *z = new FxConstant(g_atan2(y, x) * (180 / M_PI), ScriptPosition);
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delete this;
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return z;
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}
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if (yval->ValueType->GetRegType() != REGT_FLOAT && !yval->isConstant())
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{
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yval = new FxFloatCast(yval);
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}
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if (xval->ValueType->GetRegType() != REGT_FLOAT && !xval->isConstant())
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{
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xval = new FxFloatCast(xval);
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}
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ValueType = TypeFloat64;
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return this;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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ExpEmit FxATan2::Emit(VMFunctionBuilder *build)
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{
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ExpEmit yreg = ToReg(build, yval);
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ExpEmit xreg = ToReg(build, xval);
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yreg.Free(build);
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xreg.Free(build);
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ExpEmit out(build, REGT_FLOAT);
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build->Emit(OP_ATAN2, out.RegNum, yreg.RegNum, xreg.RegNum);
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return out;
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}
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//==========================================================================
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//
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// The atan2 opcode only takes registers as parameters, so any constants
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// must be loaded into registers first.
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//
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//==========================================================================
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ExpEmit FxATan2::ToReg(VMFunctionBuilder *build, FxExpression *val)
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{
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if (val->isConstant())
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{
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ExpEmit reg(build, REGT_FLOAT);
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build->Emit(OP_LKF, reg.RegNum, build->GetConstantFloat(static_cast<FxConstant*>(val)->GetValue().GetFloat()));
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return reg;
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}
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return val->Emit(build);
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}
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//==========================================================================
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//
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//
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@ -1039,6 +1039,11 @@ begin:
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reg.f[a] = reg.f[B] > konstf[C] ? reg.f[B] : konstf[C];
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NEXTOP;
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OP(ATAN2):
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ASSERTF(a); ASSERTF(B); ASSERTF(C);
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reg.f[a] = g_atan2(reg.f[B], reg.f[C]) * (180 / M_PI);
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NEXTOP;
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OP(FLOP):
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ASSERTF(a); ASSERTF(B);
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fb = reg.f[B];
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@ -174,6 +174,7 @@ xx(MINF_RR, min, RFRFRF), // fA = min(fB),fkC)
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xx(MINF_RK, min, RFRFKF),
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xx(MAXF_RR, max, RFRFRF), // fA = max(fB),fkC)
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xx(MAXF_RK, max, RFRFKF),
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xx(ATAN2, atan2, RFRFRF), // fA = atan2(fB,fC), result is in degrees
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xx(FLOP, flop, RFRFI8), // fA = f(fB), where function is selected by C
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xx(EQF_R, beq, CFRR), // if ((fB == fkC) != (A & 1)) then pc++
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xx(EQF_K, beq, CFRK),
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