ENH: Add a test for the corner case hit by ParaView bug #2579

tests/BoundsBehindViewer.c

+/* -*- c -*- *****************************************************************
+** Id
+**
+** Copyright (C) 2005 Sandia Corporation
+** Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
+** license for use of this work by or on behalf of the U.S. Government.
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that this Notice and any statement
+** of authorship are reproduced on all copies.
+**
+** This tests a corner case in which the bounds of an object extens from
+** the viewing frustum to behind the viewpoint in perspective mode.
+*****************************************************************************/
+
+#include <GL/ice-t.h>
+#include "test-util.h"
+#include "test_codes.h"
+#include "glwin.h"
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+
+static void draw(void)
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glBegin(GL_QUADS);
+      glVertex3f(-1.0, -1.0, 0.0);
+      glVertex3f(1.0, -1.0, 0.0);
+      glVertex3f(1.0, 1.0, 0.0);
+      glVertex3f(-1.0, 1.0, 0.0);
+    glEnd();
+}
+
+static void PrintMatrix(float *mat)
+{
+    int r, c;
+
+    for (c = 0; c < 4; c++) {
+        for (r = 0; r < 4; r++) {
+            printf("%f ", mat[4*r + c]);
+        }
+        printf("\n");
+    }
+}
+
+int BoundsBehindViewer(int argc, char * argv[])
+{
+    float mat[16];
+
+    /* To remove warning */
+    (void)argc;
+    (void)argv;
+
+    GLint rank;
+    icetGetIntegerv(ICET_RANK, &rank);
+
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+
+    icetDrawFunc(draw);
+    icetStrategy(ICET_STRATEGY_REDUCE);
+
+    icetBoundingBoxf(-1.0, 1.0, -1.0, 1.0, -0.0, 0.0);
+
+  /* We're just going to use one tile. */
+    icetResetTiles();
+    icetAddTile(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 0);
+
+  /* Set up the transformation such that the quad in draw should cover the
+     entire screen, but part of it extends behind the viewpoint.  Furthermore, a
+     naive division by w will show all points to the right of the screen (which,
+     of course, is wrong). */
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glTranslatef(0.0, 0.0, -1.5);
+    glRotatef(10.0, 0.0, 1.0, 0.0);
+    glScalef(10.0, 10.0, 10.0);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 2.0);
+
+    printf("Modelview matrix:\n");
+    glGetFloatv(GL_MODELVIEW_MATRIX, mat);
+    PrintMatrix(mat);
+    printf("Projection matrix:\n");
+    glGetFloatv(GL_PROJECTION_MATRIX, mat);
+    PrintMatrix(mat);
+
+  /* Other normal OpenGL setup. */
+    glEnable(GL_DEPTH_TEST);
+    glDisable(GL_LIGHTING);
+    glColor3f(1.0, 1.0, 1.0);
+
+  /* All the processes have the same data.  Go ahead and tell IceT. */
+    icetDataReplicationGroupColor(0);
+
+    icetDrawFrame();
+
+  /* Test the resulting image to make sure the polygon was drawn over it. */
+    if (rank == 0) {
+        GLuint *cb = (GLuint *)icetGetColorBuffer();
+        if (cb[0] != 0xFFFFFFFF) {
+            printf("First pixel in color buffer wrong: 0x%x\n", cb[0]);
+            finalize_test();
+            return TEST_FAILED;
+        }
+    }
+
+    finalize_test();
+    return TEST_PASSED;
+}

tests/CMakeLists.txt

@@ -9,12 +9,13 @@
 #
 
 SET(MyTests
-	SimpleExample.c
-	BlankTiles.c
-	CompressionSize.c
-	DisplayNoDraw.c
-#	RandomTransform.c
-	)
+  BlankTiles.c
+  BoundsBehindViewer.c
+  CompressionSize.c
+  DisplayNoDraw.c
+  RandomTransform.c
+  SimpleExample.c
+  )
 
 SET(UTIL_SRCS init.c ppm.c)
 
@@ -27,27 +28,32 @@ ENDIF (WIN32)
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 
 CREATE_TEST_SOURCELIST(Tests icetTests_mpi.c ${MyTests}
-		       EXTRA_INCLUDE mpi_comm.h
-		       FUNCTION init_mpi_comm)
+  EXTRA_INCLUDE mpi_comm.h
+  FUNCTION init_mpi_comm)
 
 ADD_EXECUTABLE(icetTests_mpi ${Tests} ${UTIL_SRCS})
-TARGET_LINK_LIBRARIES(icetTests_mpi icet icet_strategies icet_mpi ${OPENGL_glu_LIBRARY})
+TARGET_LINK_LIBRARIES(icetTests_mpi
+  icet
+  icet_strategies
+  icet_mpi
+  ${OPENGL_glu_LIBRARY}
+  )
 
 IF (ICET_MPIRUN_EXE)
   SET(PRE_TEST_FLAGS ${ICET_MPIRUN_EXE} ${ICET_MPI_PREFLAGS})
   SET(POST_TEST_FLAGS ${ICET_MPI_POSTFLAGS})
 ENDIF (ICET_MPIRUN_EXE)
 
-SET(ICET_TEST_FLAGS "-redirect" CACHE STRING "Arguments given to the test program.")
+SET(ICET_TEST_FLAGS "" CACHE STRING "Arguments given to the test program.")
 MARK_AS_ADVANCED(ICET_TEST_FLAGS)
 SEPARATE_ARGUMENTS(ICET_TEST_FLAGS)
 
 FOREACH (test ${MyTests})
   GET_FILENAME_COMPONENT(TName ${test} NAME_WE)
-  ADD_TEST(${TName}
-	   ${PRE_TEST_FLAGS}
-		${C_TEST_PATH}/icetTests_mpi ${ICET_TEST_FLAGS} ${TName}
-		${POST_TEST_FLAGS})
+  ADD_TEST(IceT${TName}
+    ${PRE_TEST_FLAGS}
+    ${C_TEST_PATH}/icetTests_mpi ${ICET_TEST_FLAGS} ${TName}
+    ${POST_TEST_FLAGS})
 ENDFOREACH(test)
 
 IF (WIN32)