3D viewport, milestone 1

src/3d/Shader3D.h

@@ -0,0 +1,72 @@
+// Shader3D.h - Shader management for McRogueFace 3D
+// Handles loading, compiling, and uniform management for PS1-style shaders
+
+#pragma once
+
+#include "Math3D.h"
+#include <string>
+#include <unordered_map>
+
+namespace mcrf {
+
+class Shader3D {
+public:
+    Shader3D();
+    ~Shader3D();
+
+    // Load and compile shaders from embedded source strings
+    // Automatically selects desktop vs ES2 shaders based on platform
+    bool loadPS1Shaders();
+
+    // Load from custom source strings
+    bool load(const char* vertexSource, const char* fragmentSource);
+
+    // Bind/unbind shader for rendering
+    void bind();
+    void unbind();
+
+    // Check if shader is valid
+    bool isValid() const { return program_ != 0; }
+
+    // Uniform setters (cached location lookup)
+    void setUniform(const std::string& name, float value);
+    void setUniform(const std::string& name, int value);
+    void setUniform(const std::string& name, bool value);
+    void setUniform(const std::string& name, const vec2& value);
+    void setUniform(const std::string& name, const vec3& value);
+    void setUniform(const std::string& name, const vec4& value);
+    void setUniform(const std::string& name, const mat4& value);
+
+    // Get attribute location for VBO setup
+    int getAttribLocation(const std::string& name);
+
+    // Standard attribute locations for PS1 shaders
+    static constexpr int ATTRIB_POSITION = 0;
+    static constexpr int ATTRIB_TEXCOORD = 1;
+    static constexpr int ATTRIB_NORMAL = 2;
+    static constexpr int ATTRIB_COLOR = 3;
+
+private:
+    unsigned int program_ = 0;
+    std::unordered_map<std::string, int> uniformCache_;
+
+    int getUniformLocation(const std::string& name);
+};
+
+// =============================================================================
+// Embedded PS1 Shader Sources
+// =============================================================================
+
+namespace shaders {
+
+// OpenGL ES 2.0 / WebGL 1.0 shaders
+extern const char* PS1_VERTEX_ES2;
+extern const char* PS1_FRAGMENT_ES2;
+
+// OpenGL 3.2+ desktop shaders
+extern const char* PS1_VERTEX;
+extern const char* PS1_FRAGMENT;
+
+} // namespace shaders
+
+} // namespace mcrf