/**
* Take the rotation from a 4x4 transformation matrix, and return it as an axis and an angle (in radians)
* returns the output axis.
*/
kmVec3* kmMat4RotationToAxisAngle(kmVec3* pAxis, kmScalar* radians, const kmMat4* pIn)
{
/*Surely not this easy?*/
kmQuaternion temp;
kmMat3 rotation;
kmMat4ExtractRotationMat3(pIn, &rotation);
kmQuaternionRotationMatrix(&temp, &rotation);
kmQuaternionToAxisAngle(&temp, pAxis, radians);
return pAxis;
}
kmQuaternion* kmQuaternionLookRotation(kmQuaternion* pOut, const kmVec3* direction, const kmVec3* upDirection) {
kmMat4 lookAt;
kmMat3 rot;
kmMat4LookAt(&lookAt, &KM_VEC3_ZERO, direction, upDirection);
kmMat4ExtractRotationMat3(&lookAt, &rot);
kmQuaternionRotationMatrix(pOut, &rot);
kmQuaternionNormalize(pOut, pOut);
return pOut;
}
/*
* FIXME: Stupid argument ordering
*/
void GenericRenderer::set_auto_uniforms_on_shader(GPUProgram& program,
CameraID camera,
Renderable &subactor) {
//Calculate the modelview-projection matrix
Mat4 modelview_projection;
Mat4 modelview;
const Mat4 model = subactor.final_transformation();
const Mat4& view = window().camera(camera)->view_matrix();
const Mat4& projection = window().camera(camera)->projection_matrix();
kmMat4Multiply(&modelview, &view, &model);
kmMat4Multiply(&modelview_projection, &projection, &modelview);
if(program.uniforms().uses_auto(SP_AUTO_VIEW_MATRIX)) {
program.uniforms().set_mat4x4(
program.uniforms().auto_variable_name(SP_AUTO_VIEW_MATRIX),
view
);
}
if(program.uniforms().uses_auto(SP_AUTO_MODELVIEW_PROJECTION_MATRIX)) {
program.uniforms().set_mat4x4(
program.uniforms().auto_variable_name(SP_AUTO_MODELVIEW_PROJECTION_MATRIX),
modelview_projection
);
}
if(program.uniforms().uses_auto(SP_AUTO_MODELVIEW_MATRIX)) {
program.uniforms().set_mat4x4(
program.uniforms().auto_variable_name(SP_AUTO_MODELVIEW_MATRIX),
modelview
);
}
if(program.uniforms().uses_auto(SP_AUTO_PROJECTION_MATRIX)) {
program.uniforms().set_mat4x4(
program.uniforms().auto_variable_name(SP_AUTO_PROJECTION_MATRIX),
projection
);
}
if(program.uniforms().uses_auto(SP_AUTO_INVERSE_TRANSPOSE_MODELVIEW_MATRIX)) {
Mat3 inverse_transpose_modelview;
kmMat4ExtractRotationMat3(&modelview, &inverse_transpose_modelview);
kmMat3Inverse(&inverse_transpose_modelview, &inverse_transpose_modelview);
kmMat3Transpose(&inverse_transpose_modelview, &inverse_transpose_modelview);
program.uniforms().set_mat3x3(
program.uniforms().auto_variable_name(SP_AUTO_INVERSE_TRANSPOSE_MODELVIEW_MATRIX),
inverse_transpose_modelview
);
}
/*
if(pass.uses_auto_uniform(SP_AUTO_MATERIAL_AMBIENT)) {
pass.program()->uniforms().set_colour(
pass.auto_uniform_variable_name(SP_AUTO_MATERIAL_AMBIENT),
pass.ambient()
);
}
if(pass.uses_auto_uniform(SP_AUTO_MATERIAL_DIFFUSE)) {
pass.program()->uniforms().set_colour(
pass.auto_uniform_variable_name(SP_AUTO_MATERIAL_DIFFUSE),
pass.diffuse()
);
}
if(pass.uses_auto_uniform(SP_AUTO_MATERIAL_SPECULAR)) {
pass.program()->uniforms().set_colour(
pass.auto_uniform_variable_name(SP_AUTO_MATERIAL_SPECULAR),
pass.specular()
);
}
if(pass.uses_auto_uniform(SP_AUTO_MATERIAL_SHININESS)) {
pass.program()->uniforms().set_float(
pass.auto_uniform_variable_name(SP_AUTO_MATERIAL_SHININESS),
pass.shininess()
);
}
if(pass.uses_auto_uniform(SP_AUTO_MATERIAL_ACTIVE_TEXTURE_UNITS)) {
pass.program()->uniforms().set_int(
pass.auto_uniform_variable_name(SP_AUTO_MATERIAL_ACTIVE_TEXTURE_UNITS),
pass.texture_unit_count()
);
}*/
}
