Add normals, some smooth and some creased, to our mesh, to help simulate lighting.

Author: BSVino

game/game.cpp

@@ -338,7 +338,9 @@ void CGame::Draw()
 	r.UseProgram("model");
 
 	// Set the sunlight direction. The y component is -1 so the light is pointing down.
-	r.SetUniform("vecSunlight", Vector(-1, -1, 0.5f).Normalized());
+	Vector vecSunlight = Vector(cos(Game()->GetTime()), -1, sin(Game()->GetTime())).Normalized();
+
+	r.SetUniform("vecSunlight", vecSunlight);
 
 	r.SetUniform("bDiffuse", false);
 
@@ -352,21 +354,39 @@ void CGame::Draw()
 		r.Vertex(Vector(30, 0, -30));
 	r.EndRender();
 
-	r.SetUniform("vecColor", Vector4D(1, 1, 1, 1));
+	{
+		CRenderingContext r(pRenderer, true);
+
+		r.UseProgram("model");
 
-	r.SetUniform("bDiffuse", true);
-	r.BindTexture(m_iCrateTexture);
+		r.SetUniform("vecSunlight", vecSunlight);
 
-	r.Scale(4, 4, 4);
+		r.SetUniform("vecColor", Vector4D(1, 1, 1, 1));
 
-	// Render the triangles.
-	r.BeginRenderVertexArray(m_iBillboardVB);
-	r.SetPositionBuffer(0U * sizeof(float), 5 * sizeof(float));
-	r.SetTexCoordBuffer(3 * sizeof(float), 5 * sizeof(float));
-	r.EndRenderVertexArrayIndexed(m_iBillboardIB, 6);
+		r.SetUniform("bDiffuse", true);
+		r.BindTexture(m_iCrateTexture);
 
-	r.SetUniform("bDiffuse", false);
-	r.Scale(.25, .25, .25);
+		r.Scale(4, 4, 4);
+
+		r.Translate(Vector(1, 0, 0));
+
+		// Render the triangles.
+		r.BeginRenderVertexArray(m_iMeshSmoothVB);
+		r.SetPositionBuffer(0U * sizeof(float), 8 * sizeof(float));
+		r.SetTexCoordBuffer(3 * sizeof(float), 8 * sizeof(float));
+		r.SetNormalsBuffer(5 * sizeof(float), 8 * sizeof(float));
+		r.EndRenderVertexArrayIndexed(m_iMeshSmoothIB, 12);
+
+		r.Translate(Vector(-1, 0, -1));
+
+		r.BeginRenderVertexArray(m_iMeshCreasedVB);
+		r.SetPositionBuffer(0U * sizeof(float), 8 * sizeof(float));
+		r.SetTexCoordBuffer(3 * sizeof(float), 8 * sizeof(float));
+		r.SetNormalsBuffer(5 * sizeof(float), 8 * sizeof(float));
+		r.EndRenderVertexArrayIndexed(m_iMeshCreasedIB, 12);
+
+		r.SetUniform("bDiffuse", false);
+	}
 
 	// Prepare a list of entities to render.
 	m_apRenderOpaqueList.clear();
@@ -686,47 +706,185 @@ void CGame::GameLoop()
 	vector<float> aflPoints;
 
 	// A
-	aflPoints.push_back(1); // Three floats - Position x
+	aflPoints.push_back(1); // Position - Three floats x
 	aflPoints.push_back(1); // y
 	aflPoints.push_back(0); // z
-	aflPoints.push_back(1); // Two floats - Vertex coordinate u
+	aflPoints.push_back(1); // Vertex coordinates - Two floats u
 	aflPoints.push_back(1); // v
+	aflPoints.push_back(0); // Normal - Three floats x
+	aflPoints.push_back(0); // y
+	aflPoints.push_back(1); // z
 
 	// B
 	aflPoints.push_back(0);
 	aflPoints.push_back(1);
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
 	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
 
 	// C
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
 
 	// D
 	aflPoints.push_back(1);
 	aflPoints.push_back(0);
 	aflPoints.push_back(0);
 	aflPoints.push_back(1);
 	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+
+	// A
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+
+	// B
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+
+	// C
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+
+	// D
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
 
 	vector<unsigned int> aiIndices;
 
-	// First triangle
 	aiIndices.push_back(3);
 	aiIndices.push_back(0);
 	aiIndices.push_back(1);
 
-	// Second triangle
 	aiIndices.push_back(3);
 	aiIndices.push_back(1);
 	aiIndices.push_back(2);
 
-	m_iBillboardVB = CRenderer::LoadVertexDataIntoGL(aflPoints.size() * sizeof(float), &aflPoints[0]);
-	m_iBillboardIB = CRenderer::LoadIndexDataIntoGL(aiIndices.size() * sizeof(unsigned int), &aiIndices[0]);
+	aiIndices.push_back(7);
+	aiIndices.push_back(4);
+	aiIndices.push_back(5);
+
+	aiIndices.push_back(7);
+	aiIndices.push_back(5);
+	aiIndices.push_back(6);
+
+	m_iMeshCreasedVB = CRenderer::LoadVertexDataIntoGL(aflPoints.size() * sizeof(float), &aflPoints[0]);
+	m_iMeshCreasedIB = CRenderer::LoadIndexDataIntoGL(aiIndices.size() * sizeof(unsigned int), &aiIndices[0]);
+
+	aflPoints.clear();
+	aiIndices.clear();
+
+	Vector vecFront(0, 0, 1);
+	Vector vecSide(-1, 0, 0);
+	Vector vecAverage = ((vecFront + vecSide)*0.5f).Normalized();
+
+	aflPoints.push_back(1); // Three floats - Position x
+	aflPoints.push_back(1); // y
+	aflPoints.push_back(0); // z
+	aflPoints.push_back(1); // Two floats - Vertex coordinate u
+	aflPoints.push_back(1); // v
+	aflPoints.push_back(vecFront.x);
+	aflPoints.push_back(vecFront.y);
+	aflPoints.push_back(vecFront.z);
+
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(vecAverage.x);
+	aflPoints.push_back(vecAverage.y);
+	aflPoints.push_back(vecAverage.z);
+
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(vecAverage.x);
+	aflPoints.push_back(vecAverage.y);
+	aflPoints.push_back(vecAverage.z);
+
+	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(vecFront.x);
+	aflPoints.push_back(vecFront.y);
+	aflPoints.push_back(vecFront.z);
+
+	aflPoints.push_back(0);
+	aflPoints.push_back(0);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(0);
+	aflPoints.push_back(vecSide.x);
+	aflPoints.push_back(vecSide.y);
+	aflPoints.push_back(vecSide.z);
+
+	aflPoints.push_back(0);
+	aflPoints.push_back(1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(-1);
+	aflPoints.push_back(1);
+	aflPoints.push_back(vecSide.x);
+	aflPoints.push_back(vecSide.y);
+	aflPoints.push_back(vecSide.z);
+
+	aiIndices.push_back(3);
+	aiIndices.push_back(0);
+	aiIndices.push_back(1);
+
+	aiIndices.push_back(3);
+	aiIndices.push_back(1);
+	aiIndices.push_back(2);
+
+	aiIndices.push_back(2);
+	aiIndices.push_back(1);
+	aiIndices.push_back(5);
+
+	aiIndices.push_back(2);
+	aiIndices.push_back(5);
+	aiIndices.push_back(4);
+
+	m_iMeshSmoothVB = CRenderer::LoadVertexDataIntoGL(aflPoints.size() * sizeof(float), &aflPoints[0]);
+	m_iMeshSmoothIB = CRenderer::LoadIndexDataIntoGL(aiIndices.size() * sizeof(unsigned int), &aiIndices[0]);
 
 	aflPoints.clear();
 	aiIndices.clear();

game/game.h

@@ -106,8 +106,11 @@ class CGame : public CApplication
 	// This is the player character
 	CHandle m_hPlayer;
 
-	size_t m_iBillboardVB;
-	size_t m_iBillboardIB;
+	size_t m_iMeshSmoothVB;
+	size_t m_iMeshSmoothIB;
+
+	size_t m_iMeshCreasedVB;
+	size_t m_iMeshCreasedIB;
 };
 
 inline CGame* Game()