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engines/hpl1/engine/graphics/BackgroundImage.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#include "hpl1/engine/graphics/BackgroundImage.h"
+#include "hpl1/engine/math/Math.h"
+
+namespace hpl {
+
+//////////////////////////////////////////////////////////////////////////
+// CONSTRUCTORS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+cBackgroundImage::cBackgroundImage(iMaterial *apMat, const cVector3f &avPos, bool abTile,
+								   const cVector2f &avSize, const cVector2f &avPosPercent, const cVector2f &avVel) {
+	mpMaterial = apMat;
+
+	mvPos = avPos;
+	mbTile = abTile;
+	mvSize = avSize;
+	mvPosPercent = avPosPercent;
+	mvVel = avVel;
+
+	mvVtx = apMat->GetImage(eMaterialTexture_Diffuse)->GetVertexVecCopy(0, mvSize);
+	for (int i = 0; i < (int)mvVtx.size(); i++) {
+		mvVtx[i].pos.z = mvPos.z;
+	}
+}
+
+//-----------------------------------------------------------------------
+
+cBackgroundImage::~cBackgroundImage() {
+	hplDelete(mpMaterial);
+}
+
+//-----------------------------------------------------------------------
+
+//////////////////////////////////////////////////////////////////////////
+// PUBLIC METHODS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+void cBackgroundImage::Draw(const cRect2f &aCollideRect, iLowLevelGraphics *apLowLevelGraphics) {
+	tVector3fList lstPositions;
+	cVector3f vScreenPos(aCollideRect.x * mvPosPercent.x - mvPos.x,
+						 aCollideRect.y * mvPosPercent.y, mvPos.z - mvPos.y);
+
+	// Calculate at what positions(s) the background is to be drawn.
+	if (mbTile) {
+		// The number of images needed.
+		cVector2l vNum;
+		vNum.x = (int)(aCollideRect.w / mvSize.x) + 1;
+		vNum.y = (int)(aCollideRect.h / mvSize.y) + 1;
+
+		cVector2f vStartPos;
+		if (vScreenPos.x >= 0)
+			vStartPos.x = mvSize.x - cMath::Modulus(vScreenPos.x, mvSize.x);
+		else
+			vStartPos.x = cMath::Modulus(vScreenPos.x, mvSize.x);
+
+		if (vScreenPos.y >= 0)
+			vStartPos.y = mvSize.y - cMath::Modulus(vScreenPos.y, mvSize.y);
+		else
+			vStartPos.y = cMath::Modulus(vScreenPos.y, mvSize.y);
+
+		// Log("Screen: %f : %f\n",vScreenPos.x, vScreenPos.y);
+		// Log("Start: %f : %f\n",vStartPos.x, vStartPos.y);
+		// Log("Pos: %f : %f\n",mvPos.x, mvPos.y);
+
+		if (vStartPos.x > 0) {
+			vStartPos.x -= mvSize.x;
+			vNum.x++;
+		}
+		if (vStartPos.y > 0) {
+			vStartPos.y -= mvSize.y;
+			vNum.y++;
+		}
+
+		for (int x = 0; x < vNum.x; x++)
+			for (int y = 0; y < vNum.y; y++) {
+				lstPositions.push_back(cVector3f(vStartPos.x + mvSize.x * x,
+												 vStartPos.y + mvSize.y * y, vScreenPos.z));
+			}
+	} else {
+		cRect2f Rect(vScreenPos.x, vScreenPos.y, mvSize.x, mvSize.y);
+
+		if (cMath::BoxCollision(aCollideRect, Rect)) {
+			lstPositions.push_back(vScreenPos);
+		}
+	}
+
+	// Draw the images
+	mpMaterial->StartRendering(eMaterialRenderType_Diffuse, NULL, NULL);
+
+	int lIdxAdd = 0;
+
+	tVector3fListIt it = lstPositions.begin();
+	for (; it != lstPositions.end(); it++) {
+		mvVtx[0].pos.x = it->x;
+		mvVtx[0].pos.y = it->y;
+		apLowLevelGraphics->AddVertexToBatch(mvVtx[0]);
+
+		mvVtx[1].pos.x = it->x + mvSize.x;
+		mvVtx[1].pos.y = it->y;
+		apLowLevelGraphics->AddVertexToBatch(mvVtx[1]);
+
+		mvVtx[2].pos.x = it->x + mvSize.x;
+		mvVtx[2].pos.y = it->y + mvSize.y;
+		apLowLevelGraphics->AddVertexToBatch(mvVtx[2]);
+
+		mvVtx[3].pos.x = it->x;
+		mvVtx[3].pos.y = it->y + mvSize.y;
+		apLowLevelGraphics->AddVertexToBatch(mvVtx[3]);
+
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 0);
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 1);
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 2);
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 3);
+
+		/*apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 2);
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 3);
+		apLowLevelGraphics->AddIndexToBatch(lIdxAdd + 0);*/
+
+		lIdxAdd += 4;
+	}
+
+	do {
+		apLowLevelGraphics->FlushQuadBatch(mpMaterial->GetBatchFlags(eMaterialRenderType_Diffuse), false);
+	} while (mpMaterial->NextPass(eMaterialRenderType_Diffuse));
+
+	apLowLevelGraphics->ClearBatch();
+
+	mpMaterial->EndRendering(eMaterialRenderType_Diffuse);
+}
+//-----------------------------------------------------------------------
+
+void cBackgroundImage::Update() {
+	mvPos += mvVel;
+
+	if (mbTile) {
+		if (mvPos.x >= mvSize.x)
+			mvPos.x = mvPos.x - mvSize.x;
+		if (mvPos.y >= mvSize.y)
+			mvPos.y = mvPos.y - mvSize.y;
+	}
+}
+
+//-----------------------------------------------------------------------
+} // namespace hpl