1 // Copyright (C) 2011 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma version(1) 16 17 #pragma rs java_package_name(com.android.scenegraph) 18 19 //#define DEBUG_CAMERA 20 #include "scenegraph_objects.rsh" 21 22 void root(const rs_allocation *v_in, rs_allocation *v_out, const float *usrData) { 23 24 SgCamera *cam = (SgCamera *)rsGetElementAt(*v_in, 0); 25 float aspect = *usrData; 26 if (cam->aspect != aspect) { 27 cam->isDirty = 1; 28 cam->aspect = aspect; 29 } 30 if (cam->isDirty) { 31 rsMatrixLoadPerspective(&cam->proj, cam->horizontalFOV, cam->aspect, cam->near, cam->far); 32 } 33 34 const SgTransform *camTransform = (const SgTransform *)rsGetElementAt(cam->transformMatrix, 0); 35 //rsDebug("Camera stamp", cam->transformTimestamp); 36 //rsDebug("Transform stamp", camTransform->timestamp); 37 if (camTransform->timestamp != cam->transformTimestamp || cam->isDirty) { 38 cam->isDirty = 1; 39 rs_matrix4x4 camPosMatrix; 40 rsMatrixLoad(&camPosMatrix, &camTransform->globalMat); 41 float4 zero = {0.0f, 0.0f, 0.0f, 1.0f}; 42 cam->position = rsMatrixMultiply(&camPosMatrix, zero); 43 44 rsMatrixInverse(&camPosMatrix); 45 rsMatrixLoad(&cam->view, &camPosMatrix); 46 47 rsMatrixLoad(&cam->viewProj, &cam->proj); 48 rsMatrixMultiply(&cam->viewProj, &cam->view); 49 50 rsExtractFrustumPlanes(&cam->viewProj, 51 &cam->frustumPlanes[0], &cam->frustumPlanes[1], 52 &cam->frustumPlanes[2], &cam->frustumPlanes[3], 53 &cam->frustumPlanes[3], &cam->frustumPlanes[4]); 54 } 55 56 if (cam->isDirty) { 57 cam->timestamp ++; 58 } 59 60 cam->isDirty = 0; 61 cam->transformTimestamp = camTransform->timestamp; 62 63 #ifdef DEBUG_CAMERA 64 printCameraInfo(cam); 65 #endif //DEBUG_CAMERA 66 } 67