From 6271f5ce797bf12be64c710b66b1b9e93a239829 Mon Sep 17 00:00:00 2001
From: Chuyan Zhang <chuyan@ucsb.edu>
Date: Thu, 10 Oct 2024 18:51:05 -0700
Subject: move to new resource abstraction

---
 include/render_assets.h | 94 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 include/render_assets.h

(limited to 'include/render_assets.h')

diff --git a/include/render_assets.h b/include/render_assets.h
new file mode 100644
index 0000000..1819271
--- /dev/null
+++ b/include/render_assets.h
@@ -0,0 +1,94 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <glm/glm.hpp>
+
+namespace iris {
+
+struct Mesh {
+    std::string name;
+    std::vector<glm::vec3> vertices;
+    std::vector<glm::vec3> normals;
+    std::vector<glm::vec2> texcoords;
+    // Note: w component is a sign, 1.0 or -1.0
+    std::vector<glm::vec4> tangents;
+    std::vector<uint32_t> indices;
+    int32_t material_index;
+
+    // AABB
+    glm::vec3 p_min;
+    glm::vec3 p_max;
+};
+
+struct Material {
+    std::string name;
+    glm::vec4 base_color;
+    float metallic;
+    float roughness;
+
+    int32_t base_color_texture;
+    int32_t metallic_roughness_texture;
+    int32_t normal_texture;
+    int32_t occulsion_texture;
+    int32_t emissive_texture;
+};
+
+
+struct Image {
+    std::vector<uint8_t> data;
+    glm::uvec3 extent;
+    int32_t bits_per_channel;
+};
+
+struct Sampler2D {
+    int32_t min_filter;
+    int32_t mag_filter;
+    int32_t wrap_s;
+    int32_t wrap_t;
+};
+
+struct Texture {
+    std::string name;
+    Image image;
+    Sampler2D sampler;
+};
+
+struct Camera {
+    enum struct Tag {
+        Perspective,
+        Orthographic,
+    } intrinsic_tag;
+    struct PerspectiveCamera {
+        float fovx;
+        float fovy;
+        float aspect;
+        float znear;
+        float zfar;
+    };
+
+    struct OrthographicCamera {
+        float xmag;
+        float ymag;
+        float znear;
+        float zfar;
+    };
+    union {
+        PerspectiveCamera perspective;
+        OrthographicCamera orthographic;
+    } intrinsic;
+    glm::vec3 position;
+    glm::vec3 direction;
+    glm::vec3 up;
+};
+
+struct Scene {
+    std::vector<Mesh> meshes;
+    std::vector<Material> materials;
+    std::vector<Texture> textures;
+
+    Camera camera;
+};
+
+} // namespace iris
\ No newline at end of file
-- 
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