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GenMeshHeightmap flat shading normals (#1140)

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Ádám Dóda 2020-03-24 13:27:49 +01:00 • committed by GitHub
parent 51a8e1d692
commit 584e2d664c
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1 changed files with 33 additions and 8 deletions
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37
src/models.c
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@ -1831,6 +1831,11 @@ Mesh GenMeshHeightmap(Image heightmap, Vector3 size)
Vector3 scaleFactor = { size.x/mapX, size.y/255.0f, size.z/mapZ };
Vector3 vA;
Vector3 vB;
Vector3 vC;
Vector3 vN;
for (int z = 0; z < mapZ-1; z++)
{
for (int x = 0; x < mapX-1; x++)
@ -1888,14 +1893,34 @@ Mesh GenMeshHeightmap(Image heightmap, Vector3 size)
// Fill normals array with data
//--------------------------------------------------------------
for (int i = 0; i < 18; i += 3)
for (int i = 0; i < 18; i += 9)
{
mesh.normals[nCounter + i] = 0.0f;
mesh.normals[nCounter + i + 1] = 1.0f;
mesh.normals[nCounter + i + 2] = 0.0f;
}
vA.x = mesh.vertices[nCounter + i];
vA.y = mesh.vertices[nCounter + i + 1];
vA.z = mesh.vertices[nCounter + i + 2];
// TODO: Calculate normals in an efficient way
vB.x = mesh.vertices[nCounter + i + 3];
vB.y = mesh.vertices[nCounter + i + 4];
vB.z = mesh.vertices[nCounter + i + 5];
vC.x = mesh.vertices[nCounter + i + 6];
vC.y = mesh.vertices[nCounter + i + 7];
vC.z = mesh.vertices[nCounter + i + 8];
vN = Vector3Normalize(Vector3CrossProduct(Vector3Subtract(vB, vA), Vector3Subtract(vC, vA)));
mesh.normals[nCounter + i] = vN.x;
mesh.normals[nCounter + i + 1] = vN.y;
mesh.normals[nCounter + i + 2] = vN.z;
mesh.normals[nCounter + i + 3] = vN.x;
mesh.normals[nCounter + i + 4] = vN.y;
mesh.normals[nCounter + i + 5] = vN.z;
mesh.normals[nCounter + i + 6] = vN.x;
mesh.normals[nCounter + i + 7] = vN.y;
mesh.normals[nCounter + i + 8] = vN.z;
}
nCounter += 18; // 6 vertex, 18 floats
trisCounter += 2;