first commit

Minecraft.Client/Camera.cpp

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+#include "stdafx.h"
+#include "Camera.h"
+#include "MemoryTracker.h"
+#include "..\Minecraft.World\net.minecraft.world.entity.player.h"
+#include "..\Minecraft.World\net.minecraft.world.level.h"
+#include "..\Minecraft.World\net.minecraft.world.level.tile.h"
+#include "..\Minecraft.World\TilePos.h"
+
+float Camera::xPlayerOffs = 0.0f;
+float Camera::yPlayerOffs = 0.0f;
+float Camera::zPlayerOffs = 0.0f;
+
+//IntBuffer *Camera::viewport		= MemoryTracker::createIntBuffer(16);
+FloatBuffer *Camera::modelview	= MemoryTracker::createFloatBuffer(16);
+FloatBuffer *Camera::projection = MemoryTracker::createFloatBuffer(16);
+//FloatBuffer *Camera::position	= MemoryTracker::createFloatBuffer(3);
+
+float Camera::xa = 0.0f;
+float Camera::ya = 0.0f;
+float Camera::za = 0.0f;
+float Camera::xa2 = 0.0f;
+float Camera::za2 = 0.0f;
+
+void Camera::prepare(shared_ptr<Player> player, bool mirror)
+{
+    glGetFloat(GL_MODELVIEW_MATRIX, modelview);
+    glGetFloat(GL_PROJECTION_MATRIX, projection);
+
+	/* Original java code for reference
+    glGetInteger(GL_VIEWPORT, viewport);
+
+    float x = (viewport.get(0) + viewport.get(2)) / 2;
+    float y = (viewport.get(1) + viewport.get(3)) / 2;
+    gluUnProject(x, y, 0, modelview, projection, viewport, position);
+
+    xPlayerOffs = position->get(0);
+    yPlayerOffs = position->get(1);
+    zPlayerOffs = position->get(2);
+	*/
+
+	// Xbox conversion here... note that we don't bother getting the viewport as this is just working out how to get a (0,0,0) point in clip space to pass into the inverted
+	// combined model/view/projection matrix, so we just need to get this matrix and get its translation as an equivalent.
+	XMMATRIX _modelview, _proj, _final, _invert;
+	XMVECTOR _det;
+	XMFLOAT4 trans;
+
+	memcpy( &_modelview, modelview->_getDataPointer(), 64 );
+	memcpy( &_proj, projection->_getDataPointer(), 64 );
+
+#if ( defined __ORBIS__ ) || ( defined __PSVITA__ )
+	_modelview = transpose(_modelview);
+	_proj = transpose(_proj);
+	_final = _modelview * _proj;
+	_invert = sce::Vectormath::Simd::Aos::inverse(_final);
+	xPlayerOffs = _invert.getElem(0,3) / _invert.getElem(3,3);
+	yPlayerOffs = _invert.getElem(1,3) / _invert.getElem(3,3);
+	zPlayerOffs = _invert.getElem(2,3) / _invert.getElem(3,3);
+#elif defined  __PS3__
+	_modelview = transpose(_modelview);
+	_proj = transpose(_proj);
+	_final = _modelview * _proj;
+	_invert = Vectormath::Aos::inverse(_final);
+	xPlayerOffs = _invert.getElem(0,3) / _invert.getElem(3,3);
+	yPlayerOffs = _invert.getElem(1,3) / _invert.getElem(3,3);
+	zPlayerOffs = _invert.getElem(2,3) / _invert.getElem(3,3);
+#else
+	_final = XMMatrixMultiply( _modelview, _proj );
+	_det = XMMatrixDeterminant(_final);
+	_invert = XMMatrixInverse(&_det, _final);
+
+	XMStoreFloat4(&trans,_invert.r[3]);
+
+	xPlayerOffs = trans.x / trans.w;
+	yPlayerOffs = trans.y / trans.w;
+	zPlayerOffs = trans.z / trans.w;
+#endif
+
+    int flipCamera = mirror ? 1 : 0;
+
+    float xRot = player->xRot;
+    float yRot = player->yRot;
+
+    xa = cosf(yRot * PI / 180.0f) * (1 - flipCamera * 2);
+    za = sinf(yRot * PI / 180.0f) * (1 - flipCamera * 2);
+
+    xa2 = -za * sinf(xRot * PI / 180.0f) * (1 - flipCamera * 2);
+    za2 = xa * sinf(xRot * PI / 180.0f) * (1 - flipCamera * 2);
+    ya = cosf(xRot * PI / 180.0f);
+}
+
+TilePos *Camera::getCameraTilePos(shared_ptr<Mob> player, double alpha)
+{
+	return new TilePos(getCameraPos(player, alpha));
+}
+
+Vec3 *Camera::getCameraPos(shared_ptr<Mob> player, double alpha)
+{
+    double xx = player->xo + (player->x - player->xo) * alpha;
+    double yy = player->yo + (player->y - player->yo) * alpha + player->getHeadHeight();
+    double zz = player->zo + (player->z - player->zo) * alpha;
+
+    double xt = xx + Camera::xPlayerOffs * 1;
+    double yt = yy + Camera::yPlayerOffs * 1;
+    double zt = zz + Camera::zPlayerOffs * 1;
+
+    return Vec3::newTemp(xt, yt, zt);
+}
+
+int Camera::getBlockAt(Level *level, shared_ptr<Mob> player, float alpha)
+{
+    Vec3 *p = Camera::getCameraPos(player, alpha);
+    TilePos tp = TilePos(p);
+    int t = level->getTile(tp.x, tp.y, tp.z);
+    if (t != 0 && Tile::tiles[t]->material->isLiquid())
+	{
+        float hh = LiquidTile::getHeight(level->getData(tp.x, tp.y, tp.z)) - 1 / 9.0f;
+        float h = tp.y + 1 - hh;
+        if (p->y >= h)
+		{
+            t = level->getTile(tp.x, tp.y + 1, tp.z);
+        }
+    }
+    return t;
+}