Initial upload

source/Material.c

@@ -0,0 +1,80 @@
+#include "Material.h"
+
+material_collection_t material_collection_create(size_t size)
+{
+    if (size > 254)
+    {
+        size = 254; // Limit the count to 254 to fit in a uint8_t
+    }
+
+    material_collection_t collection = {0};
+    collection.buffer = (material_t*)malloc(size * sizeof(material_t));
+    collection.size = (uint8_t)size;
+    return collection;
+}
+
+void material_collection_resize(material_collection_t* materials, size_t size)
+{
+    if (size > 254)
+    {
+        size = 254; // Limit the count to 254 to fit in a uint8_t
+    }
+
+    material_t* temp = realloc(materials->buffer, size * sizeof(material_t));
+    if (temp != NULL)
+    {
+        materials->buffer = temp;
+        materials->size = (uint8_t)size;
+    }
+}
+
+void material_collection_free(material_collection_t* materials)
+{
+    if (materials->buffer != NULL)
+    {
+        free(materials->buffer);
+        materials->buffer = NULL;
+    }
+}
+
+material_t material_create(const sample_bsdf_f sample, const evaluate_bsdf_f evaluate, void* data, material_collection_t* collection)
+{
+    material_t material = {0};
+
+    if (collection->count >= collection->size)
+    {
+        material_collection_resize(collection, collection->size * 2);
+    }
+
+    material.sample_bsdf = sample;
+    material.evaluate_bsdf = evaluate;
+    material.data = data;
+    material.id = collection->count;
+
+    collection->buffer[collection->count] = material;
+    collection->count++;
+
+    return material;
+}
+
+vec3s sample_material_bsdf(material_t* material, const vec3s normal, const vec3s wo, float* pdf_out)
+{
+    vec3s wi = glms_vec3_zero();
+    if (material->sample_bsdf != NULL)
+    {
+        wi = material->sample_bsdf(material->data, normal, wo, pdf_out);
+    }
+
+    return wi;
+}
+
+vec3s evaluate_material_bsdf(material_t* material, const shading_context_t* context)
+{
+    vec3s bsdf_color = glms_vec3_zero();
+    if (material->evaluate_bsdf != NULL)
+    {
+        bsdf_color = material->evaluate_bsdf(context, material->data);
+    }
+
+    return bsdf_color;
+}