Remove unused Bullet module and thirdparty code

It has been disabled in `master` since one year (#45852) and our plan
is for Bullet, and possibly other thirdparty physics engines, to be
implemented via GDExtension so that they can be selected by the users
who need them.

1 files changed, 0 insertions, 320 deletions

diff --git a/thirdparty/bullet/LinearMath/btReducedVector.h b/thirdparty/bullet/LinearMath/btReducedVector.h
deleted file mode 100644
index 313a4271f0..0000000000
--- a/thirdparty/bullet/LinearMath/btReducedVector.h
+++ /dev/null
@@ -1,320 +0,0 @@
-//
-//  btReducedVectors.h
-//  BulletLinearMath
-//
-//  Created by Xuchen Han on 4/4/20.
-//
-#ifndef btReducedVectors_h
-#define btReducedVectors_h
-#include "btVector3.h"
-#include "btMatrix3x3.h"
-#include "btAlignedObjectArray.h"
-#include <stdio.h>
-#include <vector>
-#include <algorithm>
-struct TwoInts
-{
-    int a,b;
-};
-inline bool operator<(const TwoInts& A, const TwoInts& B)
-{
-    return A.b < B.b;
-}
-
-
-// A helper vector type used for CG projections
-class btReducedVector
-{
-public:
-    btAlignedObjectArray<int> m_indices;
-    btAlignedObjectArray<btVector3> m_vecs;
-    int m_sz; // all m_indices value < m_sz
-public:
-	btReducedVector():m_sz(0)
-	{
-		m_indices.resize(0);
-		m_vecs.resize(0);
-        m_indices.clear();
-        m_vecs.clear();
-	}
-	
-    btReducedVector(int sz): m_sz(sz)
-    {
-        m_indices.resize(0);
-        m_vecs.resize(0);
-        m_indices.clear();
-        m_vecs.clear();
-    }
-    
-    btReducedVector(int sz, const btAlignedObjectArray<int>& indices, const btAlignedObjectArray<btVector3>& vecs): m_sz(sz), m_indices(indices), m_vecs(vecs)
-    {
-    }
-    
-    void simplify()
-    {
-        btAlignedObjectArray<int> old_indices(m_indices);
-        btAlignedObjectArray<btVector3> old_vecs(m_vecs);
-        m_indices.resize(0);
-        m_vecs.resize(0);
-        m_indices.clear();
-        m_vecs.clear();
-        for (int i = 0; i < old_indices.size(); ++i)
-        {
-            if (old_vecs[i].length2() > SIMD_EPSILON)
-            {
-                m_indices.push_back(old_indices[i]);
-                m_vecs.push_back(old_vecs[i]);
-            }
-        }
-    }
-    
-    btReducedVector operator+(const btReducedVector& other)
-    {
-		btReducedVector ret(m_sz);
-		int i=0, j=0;
-		while (i < m_indices.size() && j < other.m_indices.size())
-		{
-			if (m_indices[i] < other.m_indices[j])
-			{
-				ret.m_indices.push_back(m_indices[i]);
-				ret.m_vecs.push_back(m_vecs[i]);
-				++i;
-			}
-			else if (m_indices[i] > other.m_indices[j])
-			{
-				ret.m_indices.push_back(other.m_indices[j]);
-				ret.m_vecs.push_back(other.m_vecs[j]);
-				++j;
-			}
-			else
-			{
-				ret.m_indices.push_back(other.m_indices[j]);
-				ret.m_vecs.push_back(m_vecs[i] + other.m_vecs[j]);
-				++i; ++j;
-			}
-		}
-		while (i < m_indices.size())
-		{
-			ret.m_indices.push_back(m_indices[i]);
-			ret.m_vecs.push_back(m_vecs[i]);
-			++i;
-		}
-		while (j < other.m_indices.size())
-		{
-			ret.m_indices.push_back(other.m_indices[j]);
-			ret.m_vecs.push_back(other.m_vecs[j]);
-			++j;
-		}
-        ret.simplify();
-        return ret;
-    }
-
-    btReducedVector operator-()
-    {
-        btReducedVector ret(m_sz);
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            ret.m_indices.push_back(m_indices[i]);
-            ret.m_vecs.push_back(-m_vecs[i]);
-        }
-        ret.simplify();
-        return ret;
-    }
-    
-    btReducedVector operator-(const btReducedVector& other)
-    {
-		btReducedVector ret(m_sz);
-		int i=0, j=0;
-		while (i < m_indices.size() && j < other.m_indices.size())
-		{
-			if (m_indices[i] < other.m_indices[j])
-			{
-				ret.m_indices.push_back(m_indices[i]);
-				ret.m_vecs.push_back(m_vecs[i]);
-				++i;
-			}
-			else if (m_indices[i] > other.m_indices[j])
-			{
-				ret.m_indices.push_back(other.m_indices[j]);
-				ret.m_vecs.push_back(-other.m_vecs[j]);
-				++j;
-			}
-			else
-			{
-				ret.m_indices.push_back(other.m_indices[j]);
-				ret.m_vecs.push_back(m_vecs[i] - other.m_vecs[j]);
-				++i; ++j;
-			}
-		}
-		while (i < m_indices.size())
-		{
-			ret.m_indices.push_back(m_indices[i]);
-			ret.m_vecs.push_back(m_vecs[i]);
-			++i;
-		}
-		while (j < other.m_indices.size())
-		{
-			ret.m_indices.push_back(other.m_indices[j]);
-			ret.m_vecs.push_back(-other.m_vecs[j]);
-			++j;
-		}
-        ret.simplify();
-		return ret;
-    }
-    
-    bool operator==(const btReducedVector& other) const
-    {
-        if (m_sz != other.m_sz)
-            return false;
-        if (m_indices.size() != other.m_indices.size())
-            return false;
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            if (m_indices[i] != other.m_indices[i] || m_vecs[i] != other.m_vecs[i])
-            {
-                return false;
-            }
-        }
-        return true;
-    }
-    
-    bool operator!=(const btReducedVector& other) const
-    {
-        return !(*this == other);
-    }
-	
-	btReducedVector& operator=(const btReducedVector& other)
-	{
-		if (this == &other)
-		{
-			return *this;
-		}
-        m_sz = other.m_sz;
-		m_indices.copyFromArray(other.m_indices);
-		m_vecs.copyFromArray(other.m_vecs);
-		return *this;
-	}
-    
-    btScalar dot(const btReducedVector& other) const
-    {
-        btScalar ret = 0;
-        int j = 0;
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            while (j < other.m_indices.size() && other.m_indices[j] < m_indices[i])
-            {
-                ++j;
-            }
-            if (j < other.m_indices.size() && other.m_indices[j] == m_indices[i])
-            {
-                ret += m_vecs[i].dot(other.m_vecs[j]);
-//                ++j;
-            }
-        }
-        return ret;
-    }
-    
-    btScalar dot(const btAlignedObjectArray<btVector3>& other) const
-    {
-        btScalar ret = 0;
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            ret += m_vecs[i].dot(other[m_indices[i]]);
-        }
-        return ret;
-    }
-    
-    btScalar length2() const
-    {
-        return this->dot(*this);
-    }
-	
-	void normalize();
-    
-    // returns the projection of this onto other
-    btReducedVector proj(const btReducedVector& other) const;
-    
-    bool testAdd() const;
-    
-    bool testMinus() const;
-    
-    bool testDot() const;
-    
-    bool testMultiply() const;
-    
-    void test() const;
-    
-    void print() const
-    {
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            printf("%d: (%f, %f, %f)/", m_indices[i], m_vecs[i][0],m_vecs[i][1],m_vecs[i][2]);
-        }
-        printf("\n");
-    }
-    
-    
-    void sort()
-    {
-        std::vector<TwoInts> tuples;
-        for (int i = 0; i < m_indices.size(); ++i)
-        {
-            TwoInts ti;
-            ti.a = i;
-            ti.b = m_indices[i];
-            tuples.push_back(ti);
-        }
-        std::sort(tuples.begin(), tuples.end());
-        btAlignedObjectArray<int> new_indices;
-        btAlignedObjectArray<btVector3> new_vecs;
-        for (size_t i = 0; i < tuples.size(); ++i)
-        {
-            new_indices.push_back(tuples[i].b);
-            new_vecs.push_back(m_vecs[tuples[i].a]);
-        }
-        m_indices = new_indices;
-        m_vecs = new_vecs;
-    }
-};
-
-SIMD_FORCE_INLINE btReducedVector operator*(const btReducedVector& v, btScalar s)
-{
-    btReducedVector ret(v.m_sz);
-    for (int i = 0; i < v.m_indices.size(); ++i)
-    {
-        ret.m_indices.push_back(v.m_indices[i]);
-        ret.m_vecs.push_back(s*v.m_vecs[i]);
-    }
-    ret.simplify();
-    return ret;
-}
-
-SIMD_FORCE_INLINE btReducedVector operator*(btScalar s, const btReducedVector& v)
-{
-    return v*s;
-}
-
-SIMD_FORCE_INLINE btReducedVector operator/(const btReducedVector& v, btScalar s)
-{
-	return v * (1.0/s);
-}
-
-SIMD_FORCE_INLINE btReducedVector& operator/=(btReducedVector& v, btScalar s)
-{
-	v = v/s;
-	return v;
-}
-
-SIMD_FORCE_INLINE btReducedVector& operator+=(btReducedVector& v1, const btReducedVector& v2)
-{
-	v1 = v1+v2;
-	return v1;
-}
-
-SIMD_FORCE_INLINE btReducedVector& operator-=(btReducedVector& v1, const btReducedVector& v2)
-{
-	v1 = v1-v2;
-	return v1;
-}
-
-#endif /* btReducedVectors_h */