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Cleanup. Issue #929.

This commit is contained in:
Branimir Karadžić 2016-09-25 11:25:11 -07:00
parent 483d31473f
commit ab021e0724
1 changed files with 14 additions and 12 deletions
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26
examples/30-picking/picking.cpp
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@ -214,30 +214,32 @@ class ExamplePicking : public entry::AppI
bgfx::setViewTransform(RENDER_PASS_SHADING, view, proj);
// Set up picking pass
float pickView[16];
float pickAt[4]; // Need to inversly project the mouse pointer to determin what we're looking at
float pickEye[3] = { eye[0], eye[1], eye[2] }; // Eye is same location as before
float viewProj[16];
bx::mtxMul(viewProj, view, proj);
float invViewProj[16];
bx::mtxInverse(invViewProj, viewProj);
// Mouse coord in NDC
float mouseXNDC = (m_mouseState.m_mx / (float)m_width) * 2.0f - 1.0f;
float mouseXNDC = ( m_mouseState.m_mx / (float)m_width ) * 2.0f - 1.0f;
float mouseYNDC = ((m_height - m_mouseState.m_my) / (float)m_height) * 2.0f - 1.0f;
float mousePosNDCEnd[4] = { mouseXNDC, mouseYNDC, 1.0f, 1.0f };
// Unproject and perspective divide
bx::vec4MulMtx(pickAt, mousePosNDCEnd, invViewProj);
pickAt[3] = 1.0f / pickAt[3];
pickAt[0] *= pickAt[3];
pickAt[1] *= pickAt[3];
pickAt[2] *= pickAt[3];
float pickEye[3];
float mousePosNDC[3] = { mouseXNDC, mouseYNDC, 0.0f };
bx::vec3MulMtxH(pickEye, mousePosNDC, invViewProj);
float pickAt[3];
float mousePosNDCEnd[3] = { mouseXNDC, mouseYNDC, 1.0f };
bx::vec3MulMtxH(pickAt, mousePosNDCEnd, invViewProj);
// Look at our unprojected point
float pickView[16];
bx::mtxLookAt(pickView, pickEye, pickAt);
float pickProj[16];
// Tight FOV is best for picking
float pickProj[16];
bx::mtxProj(pickProj, m_fov, 1, 0.1f, 100.0f);
// View rect and transforms for picking pass
bgfx::setViewRect(RENDER_PASS_ID, 0, 0, ID_DIM, ID_DIM);
bgfx::setViewTransform(RENDER_PASS_ID, pickView, pickProj);