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[rlgl] Create function rlUpdateMeshAt

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brankoku 2019-11-07 15:05:33 -05:00 committed by GitHub
parent bba8454034
commit 40d70bf1a6
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1 changed files with 74 additions and 0 deletions
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74
src/rlgl.h
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@ -505,6 +505,7 @@ RLAPI bool rlRenderTextureComplete(RenderTexture target); // Ver
// Vertex data management
RLAPI void rlLoadMesh(Mesh *mesh, bool dynamic); // Upload vertex data into GPU and provided VAO/VBO ids
RLAPI void rlUpdateMesh(Mesh mesh, int buffer, int num); // Update vertex or index data on GPU (upload new data to one buffer)
RLAPI void rlUpdateMeshAt(Mesh mesh, int buffer, int num, int index); // Update vertex or index data on GPU, at index
RLAPI void rlDrawMesh(Mesh mesh, Material material, Matrix transform); // Draw a 3d mesh with material and transform
RLAPI void rlUnloadMesh(Mesh mesh); // Unload mesh data from CPU and GPU
@ -2580,6 +2581,79 @@ void rlUpdateMesh(Mesh mesh, int buffer, int num)
#endif
}
// Update vertex or index data on GPU, at index
// WARNING: error checking is in place that will cause the data to not be
// updated if offset + size exceeds what the buffer can hold
void rlUpdateMeshAt(Mesh mesh, int buffer, int num, int index)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Activate mesh VAO
if (vaoSupported) glBindVertexArray(mesh.vaoId);
switch (buffer)
{
case 0: // Update vertices (vertex position)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[0]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(float)*3*index, sizeof(float)*3*num, mesh.vertices);
} break;
case 1: // Update texcoords (vertex texture coordinates)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[1]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(float)*2*index, sizeof(float)*2*num, mesh.texcoords);
} break;
case 2: // Update normals (vertex normals)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[2]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(float)*3*index, sizeof(float)*3*num, mesh.normals);
} break;
case 3: // Update colors (vertex colors)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[3]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(unsigned char)*4*index, sizeof(unsigned char)*4*num, mesh.colors);
} break;
case 4: // Update tangents (vertex tangents)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[4]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(float)*4*index, sizeof(float)*4*num, mesh.tangents);
} break;
case 5: // Update texcoords2 (vertex second texture coordinates)
{
glBindBuffer(GL_ARRAY_BUFFER, mesh.vboId[5]);
if (index + num >= mesh.vertexCount) break;
else glBufferSubData(GL_ARRAY_BUFFER, sizeof(float)*2*index, sizeof(float)*2*num, mesh.texcoords2);
} break;
case 6: // Update indices (triangle index buffer)
{
unsigned short *indices = mesh.indices;
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh.vboId[6]);
if (index + num >= mesh.triangleCount*3) // 3 indices per triangle
break;
else
glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, sizeof(*indices)*index, sizeof(*indices)*num, indices);
} break;
default: break;
}
// Unbind the current VAO
if (vaoSupported) glBindVertexArray(0);
// Another option would be using buffer mapping...
//mesh.vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
// Now we can modify vertices
//glUnmapBuffer(GL_ARRAY_BUFFER);
#endif
}
// Draw a 3d mesh with material and transform
void rlDrawMesh(Mesh mesh, Material material, Matrix transform)
{