Normal/Height maps now working from models, and are only applied to models that have them.

43-normal-maps/shaders/43-framebuffers.frag.glsl

@@ -0,0 +1,82 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 FragPos;
+in vec3 Normal;
+in vec2 TexCoords;
+in vec4 FragPosLightSpace;
+in mat3 TBN;
+
+uniform vec3 lightPos;
+uniform vec3 viewPos;
+uniform sampler2D shadowMap;
+uniform sampler2D texture_diffuse1;
+uniform sampler2D texture_specular1;
+uniform sampler2D texture_height1; // bump/normal map
+uniform bool hasHeight;
+
+float ShadowCalculation(vec4 fragPosLightSpace, float bias)
+{
+    // perform perspective divide
+    vec3 projCoords = fragPosLightSpace.xyz / fragPosLightSpace.w;
+
+    // transform to [0,1] range
+    projCoords = projCoords * 0.5 + 0.5;
+
+    // avoid the frustrum
+    if(projCoords.z > 1.0) return 0.0;
+
+    // get closest depth value from light's perspective (using [0,1] range fragPosLight as coords)
+    float closestDepth = texture(shadowMap, projCoords.xy).r;
+
+    // get depth of current fragment from light's perspective
+    float currentDepth = projCoords.z;
+
+    // check whether current frag pos is in shadow
+    // PCF
+    float shadow = 0.0;
+    vec2 texelSize = 1.0 / textureSize(shadowMap, 0);
+    for(int x = -1; x <= 1; ++x) {
+      for(int y = -1; y <= 1; ++y) {
+        float pcfDepth = texture(shadowMap, projCoords.xy + vec2(x, y) * texelSize).r;
+        shadow += currentDepth - bias > pcfDepth  ? 1.0 : 0.0;
+      }
+    }
+
+    return shadow / 9.0;
+}
+
+void main()
+{
+  vec3 color = texture(texture_diffuse1, TexCoords).rgb;
+  vec3 normal = normalize(Normal);
+
+  if(hasHeight) {
+    normal = texture(texture_height1, TexCoords).rgb;
+    normal = normal * 2.0 - 1.0;
+    normal = normalize(TBN * normal);
+  }
+
+  vec3 lightColor = vec3(0.7);
+  // ambient
+  vec3 ambient = 0.3 * lightColor;
+  // diffuse
+  vec3 lightDir = normalize(lightPos - FragPos);
+  float diff = max(dot(lightDir, normal), 0.0);
+  vec3 diffuse = diff * lightColor;
+  // specular
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, normal);
+  float spec = 0.0;
+  vec3 halfwayDir = normalize(lightDir + viewDir);
+  spec = pow(max(dot(normal, halfwayDir), 0.0), 64.0);
+  vec3 specular = spec * lightColor;
+  // calculate shadow
+
+  float bias = max(0.05 * (1.0 - dot(normal, lightDir)), 0.005);
+  float shadow = ShadowCalculation(FragPosLightSpace, bias);
+
+  vec3 lighting = (ambient + (1.0 - shadow) * (diffuse + specular)) * color;
+
+  FragColor = vec4(lighting, 1.0);
+}