added files

include/Shader.hpp

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "GLFunctions.hpp"
+
+#include <glm/glm.hpp>
+#include <string>
+
+namespace planetarium {
+
+// -----------------------------------------------------------------------
+// Shader
+//
+// Thin RAII wrapper around a linked OpenGL program object, compiled from
+// a vertex + fragment shader pair loaded from disk.
+// -----------------------------------------------------------------------
+class Shader {
+public:
+    Shader() = default;
+    ~Shader();
+
+    Shader(const Shader&) = delete;
+    Shader& operator=(const Shader&) = delete;
+    Shader(Shader&& other) noexcept;
+    Shader& operator=(Shader&& other) noexcept;
+
+    // Compiles and links the program. Returns false (and logs to stderr)
+    // on failure; the shader remains unusable but the caller can continue
+    // running with a null program.
+    bool loadFromFiles(const std::string& vertexPath, const std::string& fragmentPath);
+
+    void use() const;
+    GLuint id() const { return program_; }
+
+    void setMat4(const std::string& name, const glm::mat4& m) const;
+    void setVec3(const std::string& name, const glm::vec3& v) const;
+    void setVec4(const std::string& name, const glm::vec4& v) const;
+    void setFloat(const std::string& name, float f) const;
+    void setInt(const std::string& name, int i) const;
+
+private:
+    GLuint program_ = 0;
+    GLint locationOf(const std::string& name) const;
+};
+
+}  // namespace planetarium