Day 12 done, we now have various kinds of lights.

12-direction-lights/src/shader.hpp

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <string>
+#include <climits>
+#include <glm/glm.hpp>
+
+struct Material {
+  glm::vec3 ambient{0.1f,0.1f,0.1f};
+  float shininess{32.0f};
+  unsigned int diffuseMap = 0;
+  unsigned int specularMap = 0;
+};
+
+struct Light {
+  glm::vec3 position;
+  glm::vec3 direction;
+  glm::vec3 ambient;
+  glm::vec3 diffuse;
+  glm::vec3 specular;
+  float constant;
+  float linear;
+  float quadratic;
+  float cutOff;
+  float outerCutOff;
+};
+
+class Shader
+{
+public:
+  unsigned int ID = UINT_MAX;
+
+  Shader(const char* vertexPath, const char* fragmentPath);
+  unsigned int load_shader(const std::string& filename, GLenum shader_type);
+  void use() const;
+  void setBool(const std::string &name, bool value) const;
+  void setInt(const std::string &name, int value) const;
+  void setFloat(const std::string &name, float value) const;
+  void setVec4(const std::string &name, float v1, float v2, float v3, float v4) const;
+  void setVec4(const std::string &name, const glm::vec4& value) const;
+  void setVec3(const std::string &name, float v1, float v2, float v3) const;
+  void setVec3(const std::string &name, const glm::vec3& value) const;
+  void setMat4(const std::string &name, const glm::mat4& what) const;
+  void cleanup();
+
+  void applyMaterial(const Material& material) {
+    setVec3("material.ambient", material.ambient);
+    setFloat("material.shininess", material.shininess);
+  }
+
+  void applyLight(const Light& light) {
+    setVec3("light.position", light.position);
+    setVec3("light.direction", light.direction);
+    setVec3("light.ambient", light.ambient);
+    setVec3("light.diffuse", light.diffuse);
+    setVec3("light.specular", light.specular);
+    setFloat("light.constant",  light.constant);
+    setFloat("light.linear",    light.linear);
+    setFloat("light.quadratic", light.quadratic);
+    setFloat("light.cutOff", glm::cos(glm::radians(light.cutOff)));
+    setFloat("light.outerCutOff", glm::cos(glm::radians(light.outerCutOff)));
+  }
+};