From 7d1d9ff143cd7c6c55d3fd891b43e143431ea15f Mon Sep 17 00:00:00 2001
From: raysan5 <raysan5@gmail.com>
Date: Fri, 20 May 2016 09:36:02 +0200
Subject: Support DYNAMIC_DRAW mesh loading

---
 src/rlgl.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

(limited to 'src/rlgl.c')

diff --git a/src/rlgl.c b/src/rlgl.c
index 888a9313..cc2b8942 100644
--- a/src/rlgl.c
+++ b/src/rlgl.c
@@ -1500,7 +1500,7 @@ void rlglGenerateMipmaps(Texture2D texture)
 }
 
 // Upload vertex data into a VAO (if supported) and VBO
-void rlglLoadMesh(Mesh *mesh)
+void rlglLoadMesh(Mesh *mesh, bool dynamic)
 {
     mesh->vaoId = 0;        // Vertex Array Object
     mesh->vboId[0] = 0;     // Vertex positions VBO
@@ -1510,6 +1510,9 @@ void rlglLoadMesh(Mesh *mesh)
     mesh->vboId[4] = 0;     // Vertex tangents VBO
     mesh->vboId[5] = 0;     // Vertex texcoords2 VBO
     mesh->vboId[6] = 0;     // Vertex indices VBO
+    
+    int drawHint = GL_STATIC_DRAW;
+    if (dynamic) drawHint = GL_DYNAMIC_DRAW;
 
 #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     GLuint vaoId = 0;       // Vertex Array Objects (VAO)
@@ -1527,14 +1530,14 @@ void rlglLoadMesh(Mesh *mesh)
     // Enable vertex attributes: position (shader-location = 0)
     glGenBuffers(1, &vboId[0]);
     glBindBuffer(GL_ARRAY_BUFFER, vboId[0]);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->vertices, GL_STATIC_DRAW);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->vertices, drawHint);
     glVertexAttribPointer(0, 3, GL_FLOAT, 0, 0, 0);
     glEnableVertexAttribArray(0);
 
     // Enable vertex attributes: texcoords (shader-location = 1)
     glGenBuffers(1, &vboId[1]);
     glBindBuffer(GL_ARRAY_BUFFER, vboId[1]);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords, GL_STATIC_DRAW);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords, drawHint);
     glVertexAttribPointer(1, 2, GL_FLOAT, 0, 0, 0);
     glEnableVertexAttribArray(1);
 
@@ -1543,7 +1546,7 @@ void rlglLoadMesh(Mesh *mesh)
     {
         glGenBuffers(1, &vboId[2]);
         glBindBuffer(GL_ARRAY_BUFFER, vboId[2]);
-        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->normals, GL_STATIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->normals, drawHint);
         glVertexAttribPointer(2, 3, GL_FLOAT, 0, 0, 0);
         glEnableVertexAttribArray(2);
     }
@@ -1559,7 +1562,7 @@ void rlglLoadMesh(Mesh *mesh)
     {
         glGenBuffers(1, &vboId[3]);
         glBindBuffer(GL_ARRAY_BUFFER, vboId[3]);
-        glBufferData(GL_ARRAY_BUFFER, sizeof(unsigned char)*4*mesh->vertexCount, mesh->colors, GL_STATIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(unsigned char)*4*mesh->vertexCount, mesh->colors, drawHint);
         glVertexAttribPointer(3, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0);
         glEnableVertexAttribArray(3);
     }
@@ -1575,7 +1578,7 @@ void rlglLoadMesh(Mesh *mesh)
     {
         glGenBuffers(1, &vboId[4]);
         glBindBuffer(GL_ARRAY_BUFFER, vboId[4]);
-        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->tangents, GL_STATIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->vertexCount, mesh->tangents, drawHint);
         glVertexAttribPointer(4, 3, GL_FLOAT, 0, 0, 0);
         glEnableVertexAttribArray(4);
     }
@@ -1591,7 +1594,7 @@ void rlglLoadMesh(Mesh *mesh)
     {
         glGenBuffers(1, &vboId[5]);
         glBindBuffer(GL_ARRAY_BUFFER, vboId[5]);
-        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords2, GL_STATIC_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*mesh->vertexCount, mesh->texcoords2, drawHint);
         glVertexAttribPointer(5, 2, GL_FLOAT, 0, 0, 0);
         glEnableVertexAttribArray(5);
     }
-- 
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