void CCMatrixFrustum(CCMatrix &result, float left, float right, float bottom, float top, float nearZ, float farZ)
{
float deltaX = right - left;
float deltaY = top - bottom;
float deltaZ = farZ - nearZ;
CCMatrix frust;
if( (nearZ <= 0.0f) || (farZ <= 0.0f) || (deltaX <= 0.0f) || (deltaY <= 0.0f) || (deltaZ <= 0.0f) )
return;
frust.m[0][0] = 2.0f * nearZ / deltaX;
frust.m[0][1] = frust.m[0][2] = frust.m[0][3] = 0.0f;
frust.m[1][1] = 2.0f * nearZ / deltaY;
frust.m[1][0] = frust.m[1][2] = frust.m[1][3] = 0.0f;
frust.m[2][0] = (right + left) / deltaX;
frust.m[2][1] = (top + bottom) / deltaY;
frust.m[2][2] = -(nearZ + farZ) / deltaZ;
frust.m[2][3] = -1.0f;
frust.m[3][2] = -2.0f * nearZ * farZ / deltaZ;
frust.m[3][0] = frust.m[3][1] = frust.m[3][3] = 0.0f;
CCMatrixMultiply(result, frust, result);
}
void CCSetViewMatrix()
{
CCMatrix &modelViewMatrix = CCCameraBase::currentCamera->pushedMatrix[CCCameraBase::currentCamera->currentPush];
static CCMatrix modelViewProjectionMatrix;
modelViewProjectionMatrix = modelViewMatrix;
if( gUseProjectionMatrix )
{
CCMatrixMultiply( modelViewProjectionMatrix, modelViewMatrix, CCCameraBase::currentCamera->getProjectionMatrix() );
}
const GLint *uniforms = gEngine->renderer->getShader()->uniforms;
GLUniformMatrix4fv( uniforms[UNIFORM_MODELVIEWPROJECTIONMATRIX], 1, GL_FALSE, modelViewProjectionMatrix.m );
if( uniforms[UNIFORM_MODELVIEWMATRIX] != -1 )
{
GLUniformMatrix4fv( uniforms[UNIFORM_MODELVIEWMATRIX], 1, GL_FALSE, modelViewMatrix.m );
}
if( uniforms[UNIFORM_MODELNORMALMATRIX] != -1 )
{
static CCMatrix inverseModelViewMatrix;
static CCMatrix modelNormalMatrix;
CCMatrixInverse( inverseModelViewMatrix, modelViewMatrix );
CCMatrixTranspose( modelNormalMatrix, inverseModelViewMatrix );
GLUniformMatrix4fv( uniforms[UNIFORM_MODELNORMALMATRIX], 1, GL_FALSE, modelNormalMatrix.m );
}
}
void CCMatrixRotate(CCMatrix &result, float angle, float x, float y, float z)
{
angle = -angle;
float sinAngle, cosAngle;
float mag = sqrtf(x * x + y * y + z * z);
sinAngle = sinf( angle * CC_PI / 180.0f );
cosAngle = cosf( angle * CC_PI / 180.0f );
if ( mag > 0.0f )
{
float xx, yy, zz, xy, yz, zx, xs, ys, zs;
float oneMinusCos;
CCMatrix rotMat;
x /= mag;
y /= mag;
z /= mag;
xx = x * x;
yy = y * y;
zz = z * z;
xy = x * y;
yz = y * z;
zx = z * x;
xs = x * sinAngle;
ys = y * sinAngle;
zs = z * sinAngle;
oneMinusCos = 1.0f - cosAngle;
rotMat.m[0][0] = (oneMinusCos * xx) + cosAngle;
rotMat.m[0][1] = (oneMinusCos * xy) - zs;
rotMat.m[0][2] = (oneMinusCos * zx) + ys;
rotMat.m[0][3] = 0.0f;
rotMat.m[1][0] = (oneMinusCos * xy) + zs;
rotMat.m[1][1] = (oneMinusCos * yy) + cosAngle;
rotMat.m[1][2] = (oneMinusCos * yz) - xs;
rotMat.m[1][3] = 0.0f;
rotMat.m[2][0] = (oneMinusCos * zx) - ys;
rotMat.m[2][1] = (oneMinusCos * yz) + xs;
rotMat.m[2][2] = (oneMinusCos * zz) + cosAngle;
rotMat.m[2][3] = 0.0f;
rotMat.m[3][0] = 0.0f;
rotMat.m[3][1] = 0.0f;
rotMat.m[3][2] = 0.0f;
rotMat.m[3][3] = 1.0f;
CCMatrixMultiply( result, rotMat, result );
}
}
void CCSetModelViewProjectionMatrix()
{
const CCMatrix &viewMatrix = CCCameraBase::CurrentCamera->getViewMatrix();
const CCMatrix &modelMatrix = CCCameraBase::CurrentCamera->pushedMatrix[CCCameraBase::CurrentCamera->currentPush];
if( gRenderer->openGL2() )
{
const CCMatrix &projectionMatrix = CCCameraBase::CurrentCamera->getProjectionMatrix();
const GLint *uniforms = gRenderer->getShader()->uniforms;
gRenderer->GLUniformMatrix4fv( uniforms[UNIFORM_PROJECTIONMATRIX], 1, GL_FALSE, projectionMatrix.m );
gRenderer->GLUniformMatrix4fv( uniforms[UNIFORM_VIEWMATRIX], 1, GL_FALSE, viewMatrix.m );
gRenderer->GLUniformMatrix4fv( uniforms[UNIFORM_MODELMATRIX], 1, GL_FALSE, modelMatrix.m );
if( uniforms[UNIFORM_MODELNORMALMATRIX] != -1 )
{
static CCMatrix modelViewMatrix;
modelViewMatrix = viewMatrix;
CCMatrixMultiply( modelViewMatrix, modelMatrix, modelViewMatrix );
static CCMatrix inverseModelViewMatrix;
static CCMatrix modelNormalMatrix;
CCMatrixInverse( inverseModelViewMatrix, modelViewMatrix );
CCMatrixTranspose( modelNormalMatrix, inverseModelViewMatrix );
gRenderer->GLUniformMatrix4fv( uniforms[UNIFORM_MODELNORMALMATRIX], 1, GL_FALSE, modelNormalMatrix.m );
}
}
else
{
#ifdef IOS
static CCMatrix modelViewMatrix;
modelViewMatrix = viewMatrix;
CCMatrixMultiply( modelViewMatrix, modelMatrix, modelViewMatrix );
glLoadMatrixf( modelViewMatrix.data() );
#endif
}
}
void CCMatrixOrtho(CCMatrix &result, float left, float right, float bottom, float top, float nearZ, float farZ)
{
float deltaX = right - left;
float deltaY = top - bottom;
float deltaZ = farZ - nearZ;
CCMatrix ortho;
if ( (deltaX == 0.0f) || (deltaY == 0.0f) || (deltaZ == 0.0f) )
return;
CCMatrixLoadIdentity( ortho );
ortho.m[0][0] = 2.0f / deltaX;
ortho.m[3][0] = -(right + left) / deltaX;
ortho.m[1][1] = 2.0f / deltaY;
ortho.m[3][1] = -(top + bottom) / deltaY;
ortho.m[2][2] = -2.0f / deltaZ;
ortho.m[3][2] = -(nearZ + farZ) / deltaZ;
CCMatrixMultiply( result, ortho, result );
}
void GLMultMatrixf(CCMatrix &matrix)
{
CCMatrixMultiply( CCCameraBase::currentCamera->pushedMatrix[CCCameraBase::currentCamera->currentPush], matrix, CCCameraBase::currentCamera->pushedMatrix[CCCameraBase::currentCamera->currentPush] );
}
void CCCameraBase::GluLookAt(CCMatrix &modelViewMatrix,
float eyex, float eyey, float eyez,
float centerx, float centery, float centerz,
float upx, float upy, float upz)
{
float x[3], y[3], z[3];
float mag;
/* Make rotation matrix */
/* Z vector */
z[0] = eyex - centerx;
z[1] = eyey - centery;
z[2] = eyez - centerz;
mag = sqrtf( z[0] * z[0] + z[1] * z[1] + z[2] * z[2] );
if( mag )
{ /* mpichler, 19950515 */
z[0] /= mag;
z[1] /= mag;
z[2] /= mag;
}
/* Y vector */
y[0] = upx;
y[1] = upy;
y[2] = upz;
/* X vector = Y cross Z */
x[0] = y[1] * z[2] - y[2] * z[1];
x[1] = -y[0] * z[2] + y[2] * z[0];
x[2] = y[0] * z[1] - y[1] * z[0];
/* Recompute Y = Z cross X */
y[0] = z[1] * x[2] - z[2] * x[1];
y[1] = -z[0] * x[2] + z[2] * x[0];
y[2] = z[0] * x[1] - z[1] * x[0];
/* mpichler, 19950515 */
/* cross product gives area of parallelogram, which is < 1.0 for
* non-perpendicular unit-length vectors; so normalize x, y here
*/
mag = sqrtf( x[0] * x[0] + x[1] * x[1] + x[2] * x[2] );
if( mag )
{
x[0] /= mag;
x[1] /= mag;
x[2] /= mag;
}
mag = sqrtf( y[0] * y[0] + y[1] * y[1] + y[2] * y[2] );
if( mag )
{
y[0] /= mag;
y[1] /= mag;
y[2] /= mag;
}
CCMatrix m;
// TODO: Remove define and feed directly into matrix.m
#define M(row, col) m.data()[col*4+row]
M(0,0) = x[0];
M(0,1) = x[1];
M(0,2) = x[2];
M(0,3) = 0.0f;
M(1,0) = y[0];
M(1,1) = y[1];
M(1,2) = y[2];
M(1,3) = 0.0f;
M(2,0) = z[0];
M(2,1) = z[1];
M(2,2) = z[2];
M(2,3) = 0.0f;
M(3,0) = 0.0f;
M(3,1) = 0.0f;
M(3,2) = 0.0f;
M(3,3) = 1.0f;
#undef M
CCMatrixMultiply( modelViewMatrix, m, modelViewMatrix );
/* Translate Eye to Origin */
CCMatrixTranslate( modelViewMatrix, -eyex, -eyey, -eyez );
}
void GLMultMatrixf(CCMatrix &matrix)
{
CCMatrixMultiply( pushedMatrix[currentPush], matrix, pushedMatrix[currentPush] );
}