OpenGL: replace gluProject and gluUnProject, and simplify surrounding code.

Part of T49042.

1 files changed, 17 insertions, 12 deletions

diff --git a/source/blender/editors/space_view3d/view3d_project.c b/source/blender/editors/space_view3d/view3d_project.c
index 65a6dee2f6c..f8b02f0b405 100644
--- a/source/blender/editors/space_view3d/view3d_project.c
+++ b/source/blender/editors/space_view3d/view3d_project.c
@@ -36,14 +36,13 @@
 
 #include "BLI_sys_types.h"  /* int64_t */
 
-#include "BIF_gl.h"  /* bglMats */
-#include "BIF_glutil.h"  /* bglMats */
-
 #include "BLI_math_vector.h"
 
 #include "BKE_camera.h"
 #include "BKE_screen.h"
 
+#include "GPU_matrix.h"
+
 #include "ED_view3d.h"  /* own include */
 
 #define BL_NEAR_CLIP 0.001
@@ -656,16 +655,22 @@ void ED_view3d_ob_project_mat_get_from_obmat(const RegionView3D *rv3d, float obm
 }
 
 /**
- * Uses window coordinates (x,y) and depth component z to find a point in
- * modelspace */
-void ED_view3d_unproject(bglMats *mats, float out[3], const float x, const float y, const float z)
+ * Convert between region relative coordinates (x,y) and depth component z and
+ * a point in world space. */
+void ED_view3d_project(const struct ARegion *ar, const float world[3], float region[3])
 {
-	double ux, uy, uz;
+	// viewport is set up to make coordinates relative to the region, not window
+	RegionView3D *rv3d = ar->regiondata;
+	int viewport[4] = {0, 0, ar->winx, ar->winy};
 
-	gluUnProject(x, y, z, mats->modelview, mats->projection,
-	             (GLint *)mats->viewport, &ux, &uy, &uz);
+	gpuProject(world, rv3d->viewmat, rv3d->winmat, viewport, region);
+}
+
+bool ED_view3d_unproject(const struct ARegion *ar, float regionx, float regiony, float regionz, float world[3])
+{
+	RegionView3D *rv3d = ar->regiondata;
+	int viewport[4] = {0, 0, ar->winx, ar->winy};
+	float region[3] = {regionx, regiony, regionz};
 
-	out[0] = ux;
-	out[1] = uy;
-	out[2] = uz;
+	return gpuUnProject(region, rv3d->viewmat, rv3d->winmat, viewport, world);
 }