Normal Maps

src/shaders/basicShader.frag

@@ -1,8 +1,10 @@
 #version 400 core
+uniform sampler2D texCol;
+uniform sampler2D texNormal;
+
 uniform vec3 lDirection;
 uniform bool isSky;
 uniform bool isPhong;
-uniform sampler2D tex;
 uniform float skyMult;
 uniform bool drawTextures;
 uniform bool isLightSource;
@@ -10,6 +12,7 @@ uniform bool isPickingMode;
 uniform vec3 pointLight[3];
 uniform vec4 pointLightCol[3];
 uniform mat3 normalMatrix;
+uniform bool useNormalMap;
 
 in vec3 fNormal;
 in vec3 fPosition;
@@ -21,9 +24,16 @@ out vec4 fColor;
 
 vec4 calcDirLight(vec4 tex, vec3 fPos, vec3 fNorm) {
 	// Get lighting vectors
-	vec3 LightDirection = normalize(lDirection);
-        vec3 nfNormal = normalize(fNorm);
-	vec3 nviewDirection = normalize(fPos);
+        vec3 LightDirection = normalize(lDirection);
+        vec3 nviewDirection = normalize(fPos);
+        vec3 nfNormal;
+
+        if(useNormalMap) {
+            vec3 vNorm = texture(texNormal, texCoords).rgb;
+            nfNormal = normalize(normalMatrix * vNorm);
+        } else {
+            nfNormal = normalize(fNorm);
+        }
 
 	// Compute diffuse component
         float diff = 0.2*max(0.0, dot(nfNormal, -LightDirection));
@@ -38,14 +48,22 @@ vec4 calcDirLight(vec4 tex, vec3 fPos, vec3 fNorm) {
         float mult = 1;//max(0.0, -LightDirection.y+1.5);
 
     //return vec4(0);
-	return vec4(tex.xyz * (diff + amb + spec) * mult, tex.w);
+        return vec4(tex.xyz * (diff + amb + spec) * mult, tex.w);
 }
 
 vec4 calcPointLight(vec4 tex, vec3 fPos, vec3 fNorm, int i) {
     // Get lighting vectors
 	vec3 LightDirection = normalize(pointLight[i] + fPos);
-	vec3 nfNormal = normalize(fNorm);
+        // vec3 nfNormal = normalize(fNorm);
 	vec3 nviewDirection = normalize(fPos);
+        vec3 nfNormal;
+
+        if(useNormalMap) {
+            vec3 vNorm = texture(texNormal, texCoords).rgb;
+            nfNormal = normalize(normalMatrix * vNorm);
+        } else {
+            nfNormal = normalize(fNorm);
+        }
 
     // Attenuation
 	float distance    = length(nviewDirection - pointLight[i] - fPos) / 3;
@@ -61,7 +79,7 @@ vec4 calcPointLight(vec4 tex, vec3 fPos, vec3 fNorm, int i) {
     // Compute ambient component
 	float amb = 0.2;
 
-	return vec4(pointLightCol[i].xyz * attenuation * (amb + diff + spec) * tex.xyz, pointLightCol[i].w);
+        return vec4(pointLightCol[i].xyz * attenuation * (amb + diff + spec) * tex.xyz, pointLightCol[i].w);
 }
 
 void
@@ -74,12 +92,12 @@ main()
 		fColor = ifColor;
 	}else{
 		if(drawTextures) {
-			texColor = texture(tex, texCoords);
+                        texColor = texture(texCol, texCoords);
 		} else {
-			texColor = ifColor;
+                        texColor = ifColor;
 		}
 
-		if(isLightSource) {
+                if(isLightSource) {
 		   fColor = texColor;
 		} else if(isSky) {
 			fColor = skyMult * normalize(texColor*texColor*texColor*2/1.41)*2;
@@ -89,7 +107,7 @@ main()
 			vec3 nfNormal = normalize(fNormal);
 			vec3 nviewDirection = normalize(fPosition);
 
-			fColor = calcDirLight(texColor, fPosition, fNormal)
+                        fColor = calcDirLight(texColor, fPosition, fNormal)
                         + calcPointLight(texColor, fPosition, fNormal, 0)/4
                         + calcPointLight(texColor, fPosition, fNormal, 1)/4
                         + calcPointLight(texColor, fPosition, fNormal, 2)/4;

src/viewer/simpleViewer.cpp

@@ -103,6 +103,8 @@ void Viewer::cleanup()
 void Viewer::drawSkybox()
 {
 	// Use the Skybox Shaders
+
+    glActiveTexture(GL_TEXTURE0);
 	m_program->bind();
 	s_texture->bind();
 	// Get projection and camera transformations
@@ -194,7 +196,8 @@ void Viewer::drawUi(){
 	uiViewMatrix.scale(.25, .25, .01);
 	uiViewMatrix.translate(-TEX_LENGTH/2.0, 0, 0);
 	for(int i = 0; i<TEX_LENGTH; i++)
-	{
+    {
+        glActiveTexture(GL_TEXTURE0);
 		TexturePrograms[i]->bind();
 		m_program->setUniformValue(m_mvMatrixLocation, uiViewMatrix);
 		uiViewMatrix.translate(1.2, 0, 0);
@@ -371,8 +374,17 @@ void Viewer::initShaders()
 		if ((m_vPositionLocation = m_program->attributeLocation("vPosition")) < 0)
 			qDebug() << "Unable to find shader location for " << "vPosition";
 
-		if ((m_colorLocation = m_program->uniformLocation("color")) < 0)
-			qDebug() << "Unable to find shader location for " << "color";
+        if ((m_colorLocation = m_program->uniformLocation("color")) < 0)
+            qDebug() << "Unable to find shader location for " << "color";
+
+        if ((m_useNormalMap = m_program->uniformLocation("useNormalMap")) < 0)
+            qDebug() << "Unable to find shader location for " << "useNormalMap";
+
+        if ((m_texNormal = m_program->uniformLocation("texNormal")) < 0)
+            qDebug() << "Unable to find shader location for " << "texNormal";
+
+        if ((m_texColor = m_program->uniformLocation("texCol")) < 0)
+            qDebug() << "Unable to find shader location for " << "texCol";
 
 		if ((m_mvMatrixLocation = m_program->uniformLocation("mvMatrix")) < 0)
 			qDebug() << "Unable to find shader location for " << "mvMatrix";
@@ -434,6 +446,10 @@ void Viewer::initShaders()
 	m_program->setUniformValue(m_isPhongLoc, true);
 	m_program->setUniformValue(m_drawTextLoc, false);
 	m_program->setUniformValue(m_isPickingModeLoc, false);
+    m_program->setUniformValue(m_useNormalMap, true);
+
+    m_program->setUniformValue(m_texColor, 0);
+    m_program->setUniformValue(m_texNormal, 1);
 
 
 	s_texture = new QOpenGLTexture(QImage("src/data/skybox.jpg"));/*/
@@ -442,11 +458,16 @@ void Viewer::initShaders()
 	s_texture->setMagnificationFilter(QOpenGLTexture::Linear);
 
 	// load remaining textures
-	for(int i = 0; i<TEX_LENGTH; i++){
-		std::cout << "Binding " << TexturePaths[i].toStdString() << endl;
-		TexturePrograms[i] = new QOpenGLTexture(QImage(TexturePaths[i]));
-		TexturePrograms[i]->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
-		TexturePrograms[i]->setMagnificationFilter(QOpenGLTexture::Linear);
+    for(int i = 0; i<TEX_LENGTH; i++){
+        std::cout << "Binding " << TexturePaths[i].toStdString() << endl;
+        TexturePrograms[i] = new QOpenGLTexture(QImage(TexturePaths[i]));
+        TexturePrograms[i]->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
+        TexturePrograms[i]->setMagnificationFilter(QOpenGLTexture::Linear);
+
+        std::cout << "Binding " << NormalPaths[i].toStdString() << endl;
+        TexturePrograms[TEX_LENGTH + i] = new QOpenGLTexture(QImage(NormalPaths[i]));
+        TexturePrograms[TEX_LENGTH + i]->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
+        TexturePrograms[TEX_LENGTH + i]->setMagnificationFilter(QOpenGLTexture::Linear);
 	}//*/
 }
 
@@ -702,8 +723,12 @@ void Viewer::visit(Cube &s)
 	QMatrix4x4 modelViewMatrix = modelStack.top() * QMatrix4x4(s.transform);
 	QColor* faceColor = new QColor;
 
-	glBindVertexArray(m_VAOs[VAO_Cube]);
-	TexturePrograms[s.getType()]->bind();
+    glBindVertexArray(m_VAOs[VAO_Cube]);
+
+    glActiveTexture(GL_TEXTURE0);
+    TexturePrograms[s.getType()]->bind();
+    glActiveTexture(GL_TEXTURE1);
+    TexturePrograms[TEX_LENGTH + s.getType()]->bind();
 
 	m_program->setUniformValue(m_isSkyLoc, false);
 	m_program->setUniformValue(m_drawTextLoc, true);

src/viewer/simpleViewer.h

@@ -100,7 +100,10 @@ private:
     QOpenGLShaderProgram *skyboxRenderShaderProgram;
 	QOpenGLShaderProgram *m_program;
 	int m_vPositionLocation;
+    int m_texColor;
+    int m_texNormal;
 	int m_colorLocation;
+    int m_useNormalMap;
 	int m_projMatrixLocation;
 	int m_mvMatrixLocation;
 
@@ -174,14 +177,22 @@ private:
 
 	unsigned int selectedTexture = TEX_WOODFLOOR;
 
-	QString TexturePaths[TEX_LENGTH] = {
-		"src/data/dry_ground.jpg",
-		"src/data/granite_floor.jpg",
-		"src/data/grass.jpg",
-		"src/data/limestone_wall.jpg",
-		"src/data/pierre_bouchardee.jpg",
-		"src/data/wood_floor.jpg"
-	};
+    QString TexturePaths[TEX_LENGTH] = {
+        "src/data/dry_ground.jpg",
+        "src/data/granite_floor.jpg",
+        "src/data/grass.jpg",
+        "src/data/limestone_wall.jpg",
+        "src/data/pierre_bouchardee.jpg",
+        "src/data/wood_floor.jpg"
+    };
+    QString NormalPaths[TEX_LENGTH] = {
+        "src/data/dry_ground_normals.jpg",
+        "src/data/granite_floor_normals.jpg",
+        "src/data/grass_normals.jpg",
+        "src/data/limestone_wall_normals.jpg",
+        "src/data/pierre_bouchardee_normals.jpg",
+        "src/data/wood_floor_normals.jpg"
+    };
 
 	int sideColors[6] = {
 		0xFF0000,
@@ -192,7 +203,7 @@ private:
 		0xFFFF00,
 	};
 
-	QOpenGLTexture *TexturePrograms[TEX_LENGTH];
+    QOpenGLTexture *TexturePrograms[TEX_LENGTH * 2];
 	QMatrix4x4 identityMatrix;
 
 	QQuaternion rot;