Cycles Standalone: The camera can now be moved and rotated with LMB/RMB mouse key.

ToDo: Add controls for forward/backward movement.

intern/cycles/app/cycles_standalone.cpp

@@ -29,6 +29,7 @@
 #include "util_progress.h"
 #include "util_string.h"
 #include "util_time.h"
+#include "util_transform.h"
 
 #ifdef WITH_CYCLES_STANDALONE_GUI
 #include "util_view.h"
@@ -179,6 +180,30 @@ static void display()
 	display_info(options.session->progress);
 }
 
+static void motion(int x, int y, int button)
+{
+	/* Translate */
+	if(button == 0) {
+		float3 translate = make_float3(x*0.01, y*0.01, 0.0f);
+		options.session->scene->camera->matrix = options.session->scene->camera->matrix * transform_translate(translate);
+	}
+	
+	/* Rotate */
+	else if(button == 2) {
+		float4 r1= make_float4(x*0.1, 0.0f, 1.0f, 0.0f);
+		options.session->scene->camera->matrix = options.session->scene->camera->matrix * transform_rotate(r1.x*M_PI/180.0f, make_float3(r1.y, r1.z, r1.w));
+		
+		float4 r2 = make_float4(y*0.1, 1.0f, 0.0, 0.0f);
+		options.session->scene->camera->matrix = options.session->scene->camera->matrix * transform_rotate(r2.x*M_PI/180.0f, make_float3(r2.y, r2.z, r2.w));
+	}
+	
+	/* Update and Reset */
+	options.session->scene->camera->need_update = true;
+	options.session->scene->camera->need_device_update = true;
+	
+	options.session->reset(session_buffer_params(), options.session_params.samples);
+}
+
 static void resize(int width, int height)
 {
 	options.width = width;
@@ -326,6 +351,9 @@ static void options_parse(int argc, const char **argv)
 		fprintf(stderr, "No file path specified\n");
 		exit(EXIT_FAILURE);
 	}
+	
+	/* For smoother Viewport */
+	options.session_params.start_resolution = 64;
 
 	/* load scene */
 	scene_init(options.width, options.height);
@@ -353,7 +381,7 @@ int main(int argc, const char **argv)
 
 		/* init/exit are callback so they run while GL is initialized */
 		view_main_loop(title.c_str(), options.width, options.height,
-			session_init, session_exit, resize, display, keyboard);
+			session_init, session_exit, resize, display, keyboard, motion);
 	}
 #endif
 

intern/cycles/util/util_view.cpp

@@ -38,9 +38,13 @@ struct View {
 	ViewResizeFunc resize;
 	ViewDisplayFunc display;
 	ViewKeyboardFunc keyboard;
+	ViewMotionFunc motion;
 
 	bool first_display;
 	bool redraw;
+	
+	int mouseX, mouseY;
+	int mouseBut0, mouseBut2;
 
 	int width, height;
 } V;
@@ -95,11 +99,14 @@ void view_display_help()
 
 	view_display_text(x1+20, y2-20, "Cycles Renderer");
 	view_display_text(x1+20, y2-40, "(C) 2011-2014 Blender Foundation");
-	view_display_text(x1+20, y2-80, "Help:");
-	view_display_text(x1+20, y2-100, "h:  Toggle this help message");
+	view_display_text(x1+20, y2-80, "Controls:");
+	view_display_text(x1+20, y2-100, "h:  Show/Hide this help message");
 	view_display_text(x1+20, y2-120, "r:  Restart the render");
 	view_display_text(x1+20, y2-140, "q:  Quit the program");
 	view_display_text(x1+20, y2-160, "esc:  Cancel the render");
+	
+	view_display_text(x1+20, y2-190, "LMB:  Move camera");
+	view_display_text(x1+20, y2-210, "RMB:  Rotate camera");
 
 	glColor3f(1.0f, 1.0f, 1.0f);
 }
@@ -164,6 +171,43 @@ static void view_keyboard(unsigned char key, int x, int y)
 	}
 }
 
+static void view_mouse(int button, int state, int x, int y)
+{
+	if(button == 0) {
+		if(state == GLUT_DOWN) {
+			V.mouseX = x;
+			V.mouseY = y;
+			V.mouseBut0 = 1;
+		}
+		else if(state == GLUT_UP) {
+			V.mouseBut0 = 0;
+		}
+	}
+	else if(button == 2) {
+		if(state == GLUT_DOWN) {
+			V.mouseX = x;
+			V.mouseY = y;
+			V.mouseBut2 = 1;
+		}
+		else if(state == GLUT_UP) {
+			V.mouseBut2 = 0;
+		}
+	}
+}
+
+static void view_motion(int x, int y)
+{
+	const int but = V.mouseBut0? 0:2;
+	const int distX = x - V.mouseX;
+	const int distY = y - V.mouseY;
+	
+	if(V.motion)
+		V.motion(distX, distY, but);
+	
+	V.mouseX = x;
+	V.mouseY = y;
+}
+
 static void view_idle(void)
 {
 	if(V.redraw) {
@@ -177,7 +221,7 @@ static void view_idle(void)
 void view_main_loop(const char *title, int width, int height,
 	ViewInitFunc initf, ViewExitFunc exitf,
 	ViewResizeFunc resize, ViewDisplayFunc display,
-	ViewKeyboardFunc keyboard)
+	ViewKeyboardFunc keyboard, ViewMotionFunc motion)
 {
 	const char *name = "app";
 	char *argv = (char*)name;
@@ -193,6 +237,7 @@ void view_main_loop(const char *title, int width, int height,
 	V.resize = resize;
 	V.display = display;
 	V.keyboard = keyboard;
+	V.motion = motion;
 
 	glutInit(&argc, &argv);
 	glutInitWindowSize(width, height);
@@ -210,6 +255,8 @@ void view_main_loop(const char *title, int width, int height,
 	glutIdleFunc(view_idle);
 	glutReshapeFunc(view_reshape);
 	glutKeyboardFunc(view_keyboard);
+	glutMouseFunc(view_mouse);
+	glutMotionFunc(view_motion);
 
 	glutMainLoop();
 }

intern/cycles/util/util_view.h

@@ -27,11 +27,12 @@ typedef void (*ViewExitFunc)(void);
 typedef void (*ViewResizeFunc)(int width, int height);
 typedef void (*ViewDisplayFunc)(void);
 typedef void (*ViewKeyboardFunc)(unsigned char key);
+typedef void (*ViewMotionFunc)(int x, int y, int button);
 
 void view_main_loop(const char *title, int width, int height,
 	ViewInitFunc initf, ViewExitFunc exitf,
 	ViewResizeFunc resize, ViewDisplayFunc display,
-	ViewKeyboardFunc keyboard);
+	ViewKeyboardFunc keyboard, ViewMotionFunc motion);
 
 void view_display_info(const char *info);
 void view_display_help();