assimp/tools/assimp_view/Input.cpp

/*
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Open Asset Import Library (assimp)
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  following disclaimer.

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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

#include "assimp_view.h"

namespace AssimpView {

//-------------------------------------------------------------------------------
// Handle mouse input for the FPS input behaviour
//
// Movement in x and y axis is possible
//-------------------------------------------------------------------------------
void HandleMouseInputFPS( void )
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    D3DXMATRIX matRotation;

    if (g_bMousePressed)
        {
        int nXDiff = (g_mousePos.x - g_LastmousePos.x);
        int nYDiff = (g_mousePos.y - g_LastmousePos.y);

        if( 0 != nYDiff)
            {
            D3DXMatrixRotationAxis( &matRotation, (D3DXVECTOR3*)& g_sCamera.vRight, D3DXToRadian((float)nYDiff / 6.0f));
            D3DXVec3TransformCoord( (D3DXVECTOR3*)&g_sCamera.vLookAt, (D3DXVECTOR3*)& g_sCamera.vLookAt, &matRotation );
            D3DXVec3TransformCoord( (D3DXVECTOR3*)&g_sCamera.vUp, (D3DXVECTOR3*)&g_sCamera.vUp, &matRotation );
            }

        if( 0 != nXDiff )
            {
            D3DXVECTOR3 v(0,1,0);
            D3DXMatrixRotationAxis( &matRotation, (D3DXVECTOR3*)&g_sCamera.vUp, D3DXToRadian((float)nXDiff / 6.0f) );
            D3DXVec3TransformCoord( (D3DXVECTOR3*)&g_sCamera.vLookAt, (D3DXVECTOR3*)&g_sCamera.vLookAt, &matRotation );
            D3DXVec3TransformCoord( (D3DXVECTOR3*)&g_sCamera.vRight,(D3DXVECTOR3*) &g_sCamera.vRight, &matRotation );
            }
        }

    g_LastmousePos.x = g_mousePos.x;
    g_LastmousePos.y = g_mousePos.y;
    }


//-------------------------------------------------------------------------------
// Handle mouse input for the FPS input behaviour
//
// Movement in x and y axis is possible
//-------------------------------------------------------------------------------
void HandleMouseInputTextureView( void )
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    D3DXMATRIX matRotation;

    if (g_bMousePressed)
        {
        CDisplay::Instance().SetTextureViewOffsetX((float)(g_mousePos.x - g_LastmousePos.x));
        CDisplay::Instance().SetTextureViewOffsetY((float)(g_mousePos.y - g_LastmousePos.y));
        }

    g_LastmousePos.x = g_mousePos.x;
    g_LastmousePos.y = g_mousePos.y;
    }

//-------------------------------------------------------------------------------
// handle mouse input for the light rotation
//
// Axes: global x/y axis
//-------------------------------------------------------------------------------
void HandleMouseInputLightRotate( void )
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    if (g_bMousePressedR)
        {
        int nXDiff = -(g_mousePos.x - g_LastmousePos.x);
        int nYDiff = -(g_mousePos.y - g_LastmousePos.y);

        aiVector3D v = aiVector3D(1.0f,0.0f,0.0f);
        aiMatrix4x4 mTemp;
        D3DXMatrixRotationAxis( (D3DXMATRIX*) &mTemp, (D3DXVECTOR3*)&v, D3DXToRadian((float)nYDiff / 2.0f));
        D3DXVec3TransformCoord((D3DXVECTOR3*)&g_avLightDirs[0],
            (const D3DXVECTOR3*)&g_avLightDirs[0],(const D3DXMATRIX*)&mTemp);

        v = aiVector3D(0.0f,1.0f,0.0f);
        D3DXMatrixRotationAxis( (D3DXMATRIX*) &mTemp, (D3DXVECTOR3*)&v, D3DXToRadian((float)nXDiff / 2.0f));
        D3DXVec3TransformCoord((D3DXVECTOR3*)&g_avLightDirs[0],
            (const D3DXVECTOR3*)&g_avLightDirs[0],(const D3DXMATRIX*)&mTemp);
        }
    return;
    }


//-------------------------------------------------------------------------------
// Handle mouse input for movements of the skybox
//
// The skybox can be moved by holding both the left and the right mouse button
// pressed. Rotation is possible in x and y direction.
//-------------------------------------------------------------------------------
void HandleMouseInputSkyBox( void )
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    aiMatrix4x4 matRotation;

    if (g_bMousePressedBoth )
        {
        int nXDiff = -(g_mousePos.x - g_LastmousePos.x);
        int nYDiff = -(g_mousePos.y - g_LastmousePos.y);

        aiMatrix4x4 matWorld;

        if( 0 != nYDiff)
            {
            aiVector3D v = aiVector3D(1.0f,0.0f,0.0f);
            D3DXMatrixRotationAxis( (D3DXMATRIX*) &matWorld, (D3DXVECTOR3*)&v, D3DXToRadian((float)nYDiff / 2.0f));
            CBackgroundPainter::Instance().RotateSB(&matWorld);
            }

        if( 0 != nXDiff)
            {
            aiMatrix4x4 matWorldOld;
            if( 0 != nYDiff)
                {
                matWorldOld = matWorld;
                }

            aiVector3D v = aiVector3D(0.0f,1.0f,0.0f);
            D3DXMatrixRotationAxis( (D3DXMATRIX*)&matWorld, (D3DXVECTOR3*)&v, D3DXToRadian((float)nXDiff / 2.0f) );
            matWorld =  matWorldOld * matWorld;
            CBackgroundPainter::Instance().RotateSB(&matWorld);
            }
        }
    }

//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
void HandleMouseInputLightIntensityAndColor()
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    if (g_bMousePressedM)
        {
        int nXDiff = -(g_mousePos.x - g_LastmousePos.x);
        int nYDiff = -(g_mousePos.y - g_LastmousePos.y);

        g_fLightIntensity -= (float)nXDiff / 400.0f;
        if ((nYDiff > 2 || nYDiff < -2) && (nXDiff < 20 && nXDiff > -20))
        {
            if (!g_bFPSView)
            {
                g_sCamera.vPos.z += nYDiff / 120.0f;
            }
            else
            {
                g_sCamera.vPos += (nYDiff / 120.0f) * g_sCamera.vLookAt.Normalize();
            }
        }
    }
    return;
    }

//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
void HandleMouseInputLocal( void )
    {
    POINT mousePos;
    GetCursorPos( &mousePos );
    ScreenToClient( GetDlgItem(g_hDlg,IDC_RT), &mousePos );

    g_mousePos.x = mousePos.x;
    g_mousePos.y = mousePos.y;

    aiMatrix4x4 matRotation;

    if (g_bMousePressed)
        {
        int nXDiff = -(g_mousePos.x - g_LastmousePos.x);
        int nYDiff = -(g_mousePos.y - g_LastmousePos.y);

        aiMatrix4x4 matWorld;
        if (g_eClick != EClickPos_Outside)
            {
            if( 0 != nYDiff && g_eClick != EClickPos_CircleHor)
                {
                aiVector3D v = aiVector3D(1.0f,0.0f,0.0f);
                D3DXMatrixRotationAxis( (D3DXMATRIX*) &matWorld, (D3DXVECTOR3*)&v, D3DXToRadian((float)nYDiff / 2.0f));
                g_mWorldRotate = g_mWorldRotate * matWorld;
                }

            if( 0 != nXDiff && g_eClick != EClickPos_CircleVert)
                {
                aiVector3D v = aiVector3D(0.0f,1.0f,0.0f);
                D3DXMatrixRotationAxis( (D3DXMATRIX*)&matWorld, (D3DXVECTOR3*)&v, D3DXToRadian((float)nXDiff / 2.0f) );
                g_mWorldRotate = g_mWorldRotate * matWorld;
                }
            }
        else
            {
            if(0 != nYDiff || 0 != nXDiff)
                {
                // rotate around the z-axis
                RECT sRect;
                GetWindowRect(GetDlgItem(g_hDlg,IDC_RT),&sRect);
                sRect.right -= sRect.left;
                sRect.bottom -= sRect.top;

                int xPos = g_mousePos.x - sRect.right/2;
                int yPos = g_mousePos.y - sRect.bottom/2;
                float fXDist = (float)xPos;
                float fYDist = (float)yPos / sqrtf((float)(yPos * yPos + xPos * xPos));

                bool bSign1;
                if (fXDist < 0.0f)bSign1 = false;
                else bSign1 = true;
                float fAngle = asin(fYDist);

                xPos = g_LastmousePos.x - sRect.right/2;
                yPos = g_LastmousePos.y - sRect.bottom/2;

                fXDist = (float)xPos;
                fYDist = (float)yPos / sqrtf((float)(yPos * yPos + xPos * xPos));

                bool bSign2;
                if (fXDist < 0.0f)bSign2 = false;
                else bSign2 = true;
                float fAngle2 = asin(fYDist);
                fAngle -= fAngle2;

                if (bSign1 != bSign2)
                    {
                    g_bInvert = !g_bInvert;
                    }
                if (g_bInvert)fAngle *= -1.0f;

                aiVector3D v = aiVector3D(0.0f,0.0f,1.0f);
                D3DXMatrixRotationAxis( (D3DXMATRIX*)&matWorld, (D3DXVECTOR3*)&v, (float) (fAngle * 1.2) );
                g_mWorldRotate = g_mWorldRotate * matWorld;
                }
            }
        }

    g_LastmousePos.x = g_mousePos.x;
    g_LastmousePos.y = g_mousePos.y;
    }

//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
void HandleKeyboardInputFPS( void )
    {
    unsigned char keys[256];
    GetKeyboardState( keys );

    aiVector3D tmpLook  = g_sCamera.vLookAt;
    aiVector3D tmpRight = g_sCamera.vRight;

    aiVector3D vOldPos = g_sCamera.vPos;

    // Up Arrow Key - View moves forward
    if( keys[VK_UP] & 0x80 )
        g_sCamera.vPos -= (tmpLook*-MOVE_SPEED)*g_fElpasedTime;

    // Down Arrow Key - View moves backward
    if( keys[VK_DOWN] & 0x80 )
        g_sCamera.vPos += (tmpLook*-MOVE_SPEED)*g_fElpasedTime;

    // Left Arrow Key - View side-steps or strafes to the left
    if( keys[VK_LEFT] & 0x80 )
        g_sCamera.vPos -= (tmpRight*MOVE_SPEED)*g_fElpasedTime;

    // Right Arrow Key - View side-steps or strafes to the right
    if( keys[VK_RIGHT] & 0x80 )
        g_sCamera.vPos += (tmpRight*MOVE_SPEED)*g_fElpasedTime;

    // Home Key - View elevates up
    if( keys[VK_HOME] & 0x80 )
        g_sCamera.vPos .y += MOVE_SPEED*g_fElpasedTime;

    // End Key - View elevates down
    if( keys[VK_END] & 0x80 )
        g_sCamera.vPos.y -= MOVE_SPEED*g_fElpasedTime;
    }


//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
void HandleKeyboardInputTextureView( void )
    {
    unsigned char keys[256];
    GetKeyboardState( keys );

    // Up Arrow Key
    if( keys[VK_UP] & 0x80 )
        CDisplay::Instance().SetTextureViewOffsetY ( g_fElpasedTime * 150.0f );

    // Down Arrow Key
    if( keys[VK_DOWN] & 0x80 )
        CDisplay::Instance().SetTextureViewOffsetY ( -g_fElpasedTime * 150.0f );

    // Left Arrow Key
    if( keys[VK_LEFT] & 0x80 )
        CDisplay::Instance().SetTextureViewOffsetX ( g_fElpasedTime * 150.0f );

    // Right Arrow Key
    if( keys[VK_RIGHT] & 0x80 )
        CDisplay::Instance().SetTextureViewOffsetX ( -g_fElpasedTime * 150.0f );
    }
};