From ba2f810f0752bdecf8253b34bd245c7939f23534 Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Thu, 4 Dec 2025 13:16:21 -0500
Subject: initial chunk rendering

---
 src/mesh.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/mesh.c

(limited to 'src/mesh.c')

diff --git a/src/mesh.c b/src/mesh.c
new file mode 100644
index 0000000..6b2951b
--- /dev/null
+++ b/src/mesh.c
@@ -0,0 +1,78 @@
+#include <GL/glew.h>
+
+#include "mesh.h"
+
+void mesh_init(Mesh *mesh, int vertex_count)
+{
+	glGenVertexArrays(1, &mesh->vao);
+	mesh->vbos_count = 0;
+	mesh->vertex_count = vertex_count;
+	glBindVertexArray(mesh->vao);
+}
+
+static void mesh_store(Mesh *mesh, void *data, int data_len, int dimensions, GLenum type)
+{
+	GLuint vbo;
+	GLint index = mesh->vbos_count;
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, data_len, data, GL_STATIC_DRAW);
+	glEnableVertexAttribArray(index);
+	if (type == GL_FLOAT)
+		glVertexAttribPointer(index, dimensions, type, GL_FALSE, 0, 0);
+	else
+		glVertexAttribIPointer(index, dimensions, type, 0, 0);
+	mesh->vbos[mesh->vbos_count++] = vbo;
+}
+
+void mesh_storef(Mesh *mesh, float *data, int data_len, int dimensions)
+{
+	mesh_store(mesh, data, data_len * sizeof(float), dimensions, GL_FLOAT);
+}
+
+void mesh_storei(Mesh *mesh, int *data, int data_len, int dimensions)
+{
+	mesh_store(mesh, data, data_len * sizeof(int), dimensions, GL_INT);
+}
+
+void mesh_storeu(Mesh *mesh, unsigned int *data, int data_len, int dimensions)
+{
+	mesh_store(mesh, data, data_len * sizeof(unsigned int), dimensions,
+		   GL_UNSIGNED_INT);
+}
+
+void mesh_storeb(Mesh *mesh, unsigned char *data, int data_len, int dimensions)
+{
+	mesh_store(mesh, data, data_len * sizeof(unsigned char), dimensions,
+		   GL_UNSIGNED_BYTE);
+}
+
+void mesh_finish(void)
+{
+	glBindVertexArray(0);
+}
+
+void mesh_bind(Mesh *mesh)
+{
+	glBindVertexArray(mesh->vao);
+	for (int i = 0; i < mesh->vbos_count; i++)
+		glEnableVertexAttribArray(i);
+}
+
+void mesh_unbind(Mesh *mesh)
+{
+	for (int i = 0; i < mesh->vbos_count; i++)
+		glDisableVertexAttribArray(i);
+	glBindVertexArray(0);
+}
+
+void mesh_draw(Mesh *mesh)
+{
+	glDrawArrays(GL_TRIANGLES, 0, mesh->vertex_count);
+}
+
+void mesh_free(Mesh *mesh)
+{
+	glDeleteBuffers(mesh->vbos_count, mesh->vbos);
+	glDeleteVertexArrays(1, &mesh->vao);
+}
-- 
cgit v1.2.3-freya