From: David Adam david.adam.cnrs@gmail.com
Signed-off-by: Matteo Bruni mbruni@codeweavers.com --- It gives values more similar to the native version and, incidentally, it's faster.
dlls/d3dx9_36/mesh.c | 10 ++++++---- dlls/d3dx9_36/tests/mesh.c | 11 +++++++---- 2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/dlls/d3dx9_36/mesh.c b/dlls/d3dx9_36/mesh.c index fc23745b0b1..62acd211148 100644 --- a/dlls/d3dx9_36/mesh.c +++ b/dlls/d3dx9_36/mesh.c @@ -4565,7 +4565,7 @@ HRESULT WINAPI D3DXCreatePolygon(struct IDirect3DDevice9 *device, float length, struct vertex *vertices; WORD (*faces)[3]; DWORD (*adjacency_buf)[3]; - float scale; + float angle, scale; unsigned int i;
TRACE("device %p, length %f, sides %u, mesh %p, adjacency %p.\n", @@ -4593,7 +4593,9 @@ HRESULT WINAPI D3DXCreatePolygon(struct IDirect3DDevice9 *device, float length, return hr; }
- scale = 0.5f * length / sinf(D3DX_PI / sides); + angle = D3DX_PI / sides; + scale = 0.5f * length / sinf(angle); + angle *= 2.0f;
vertices[0].position.x = 0.0f; vertices[0].position.y = 0.0f; @@ -4604,8 +4606,8 @@ HRESULT WINAPI D3DXCreatePolygon(struct IDirect3DDevice9 *device, float length,
for (i = 0; i < sides; ++i) { - vertices[i + 1].position.x = cosf(2.0f * D3DX_PI * i / sides) * scale; - vertices[i + 1].position.y = sinf(2.0f * D3DX_PI * i / sides) * scale; + vertices[i + 1].position.x = cosf(angle * i) * scale; + vertices[i + 1].position.y = sinf(angle * i) * scale; vertices[i + 1].position.z = 0.0f; vertices[i + 1].normal.x = 0.0f; vertices[i + 1].normal.y = 0.0f; diff --git a/dlls/d3dx9_36/tests/mesh.c b/dlls/d3dx9_36/tests/mesh.c index 82ae90ef758..8fd5938fac6 100644 --- a/dlls/d3dx9_36/tests/mesh.c +++ b/dlls/d3dx9_36/tests/mesh.c @@ -2683,12 +2683,14 @@ static void D3DXCreateBoxTest(void) static BOOL compute_polygon(struct mesh *mesh, float length, unsigned int sides) { unsigned int i; - float scale; + float angle, scale;
if (!new_mesh(mesh, sides + 1, sides)) return FALSE;
- scale = 0.5f * length / sinf(D3DX_PI / sides); + angle = D3DX_PI / sides; + scale = 0.5f * length / sinf(angle); + angle *= 2.0f;
mesh->vertices[0].position.x = 0.0f; mesh->vertices[0].position.y = 0.0f; @@ -2699,8 +2701,8 @@ static BOOL compute_polygon(struct mesh *mesh, float length, unsigned int sides)
for (i = 0; i < sides; ++i) { - mesh->vertices[i + 1].position.x = cosf(2.0f * D3DX_PI * i / sides) * scale; - mesh->vertices[i + 1].position.y = sinf(2.0f * D3DX_PI * i / sides) * scale; + mesh->vertices[i + 1].position.x = cosf(angle * i) * scale; + mesh->vertices[i + 1].position.y = sinf(angle * i) * scale; mesh->vertices[i + 1].position.z = 0.0f; mesh->vertices[i + 1].normal.x = 0.0f; mesh->vertices[i + 1].normal.y = 0.0f; @@ -2807,6 +2809,7 @@ static void D3DXCreatePolygonTest(void) test_polygon(device, 10.0f, 5); test_polygon(device, 10.0f, 10); test_polygon(device, 20.0f, 10); + test_polygon(device, 20.0f, 32000);
free_test_context(test_context); }