Textured Dot-Flag with Waves, just for fun

CMakeLists.txt

@@ -37,6 +37,7 @@ set(SOURCES
   src/effects/rotatesphere.cpp
   src/effects/motionblur.cpp
   src/effects/fire.cpp
+  src/effects/dotedflag.cpp
 )
 
 set(ASSETS_cg
@@ -48,6 +49,7 @@ set(ASSETS_cg
   assets-cg/xorcircles.png
   assets-cg/mapworld.png
   assets-cg/circuit.png
+  assets-cg/earth16c.png
 
   assets-cg/optionbox.png
 )

assets-cg/fxconv-metadata.txt

@@ -41,4 +41,9 @@ circuit.png:
 optionbox.png:
   type: bopti-image
   profile: p8_rgb565a
-  name: optionbox
+  name: optionbox
+
+earth16c.png:
+  type: bopti-image
+  profile: p8
+  name: earthflag

src/effects/dotedflag.cpp

@@ -0,0 +1,117 @@
+#include "effects.h"
+
+#include <num/num.h>
+#include "../utilities/fast_trig.h"
+#include "../utilities/3Dtransform.h"
+
+#include <cstring>
+
+/********************************\
+ *   MOPRHING EFFECT - MODULE 2   *
+ * Specific data and structures *
+\********************************/
+
+
+#define NB_POINTS_X 81
+#define NB_POINTS_Y 41
+#define NB_POINTS (NB_POINTS_X*NB_POINTS_Y)
+#define SCALE 80
+
+Vertex3D *Flag;
+Vertex3D *FMorph;
+
+extern libnum::num32 scale;
+extern libnum::num32 eye;
+extern libnum::num32 eyescale;
+extern int centerx, centery;
+
+static float anglef = 0.0;
+static int angle = 0;
+static int delta = 0;
+
+
+extern bopti_image_t earthflag;
+
+
+void dotflag_init( bopti_image_t *screen )
+{
+    eye = libnum::num32( 150 );
+    scale = libnum::num32( SCALE );
+    eyescale = eye*scale;
+
+    centerx = (DWIDTH / 2);
+    centery = (MAXHEIGHT / 2);
+
+	Flag = (Vertex3D *) malloc( NB_POINTS * sizeof( Vertex3D ) );
+	FMorph = (Vertex3D *) malloc( NB_POINTS * sizeof( Vertex3D ) );
+
+    // Create Flag
+	for (int i = 0; i < NB_POINTS_X; i++)
+    {
+		for (int j = 0; j < NB_POINTS_Y; j++)
+    	{
+			Flag[i+j*NB_POINTS_X].x = libnum::num32( -NB_POINTS_X/2 * 0.04f + i * 0.04f );
+			Flag[i+j*NB_POINTS_X].y = libnum::num32( -NB_POINTS_Y/2 * 0.04f + j * 0.04f );
+			Flag[i+j*NB_POINTS_X].z = libnum::num32(-1);
+			Flag[i+j*NB_POINTS_X].color = image_get_pixel(&earthflag, i*5, j*5);
+		}
+	}
+
+	for (int i = 0; i < NB_POINTS; i++)
+	{
+		FMorph[i].x = Flag[i].x;
+		FMorph[i].y = Flag[i].y;
+		FMorph[i].z = Flag[i].z;
+	}
+
+    image_copy_palette( &earthflag, screen, -1 );
+	screen->palette[0] = C_BLACK;
+}
+
+
+void dotflag_update( bopti_image_t *screen, [[Maybe_unused]] float dt )
+{
+    anglef += dt / 50000.0;
+    angle = (int) anglef;
+	delta+=10;
+
+	for (int i = 0; i < NB_POINTS_X; i++)
+    {
+		for (int j = 0; j < NB_POINTS_Y; j++)
+    	{
+			FMorph[i+j*NB_POINTS_X].z = libnum::num32(0.1f) * FastCosInt(i*9 + delta) * FastSinInt(j*18 + delta);
+		}
+	}
+
+	// Rotate the vertex in world coordinates and then project them on screen
+    for (int i = 0; i < NB_POINTS; i++)
+    {
+		RotateVertex(&FMorph[i], angle, angle, angle);
+		ProjectVertex(&FMorph[i]);
+	}
+}
+
+
+void dotflag_render( bopti_image_t *screen )
+{
+	image_fill( screen, -128 );
+
+	for (int i = 0; i < NB_POINTS; i++)
+        pixel( screen, FMorph[i].sx, FMorph[i].sy, Flag[i].color );
+
+    dimage( 0, 0, screen );
+}
+
+void dotflag_deinit( bopti_image_t *screen )
+{
+	free( Flag );	
+	free( FMorph );	
+}
+
+
+char dotflag_TextToRender[100] = "Dot-Based Wavy Textured Flag > _\0";
+
+char *dotflag_text( void )
+{
+    return dotflag_TextToRender;
+}

src/effects/effects.h

@@ -125,7 +125,7 @@ void moire_render( bopti_image_t *screen );
 void moire_deinit( bopti_image_t *screen );
 
 
-/* EFFECT #12 : Raindrops  */
+/* EFFECT #13 : Raindrops  */
 
 char *raindrops_text( void );
 void raindrops_init( bopti_image_t *screen );
@@ -134,7 +134,7 @@ void raindrops_render( bopti_image_t *screen );
 void raindrops_deinit( bopti_image_t *screen );
 
 
-/* EFFECT #13 : Rotating Sphere  */
+/* EFFECT #14 : Rotating Sphere  */
 
 char *rotatesphere_text( void );
 void rotatesphere_init( bopti_image_t *screen );
@@ -143,7 +143,7 @@ void rotatesphere_render( bopti_image_t *screen );
 void rotatesphere_deinit( bopti_image_t *screen );
 
 
-/* EFFECT #14 : Motion Blur on a Rotating Cube  */
+/* EFFECT #15 : Motion Blur on a Rotating Cube  */
 
 char *motionblur_text( void );
 void motionblur_init( bopti_image_t *screen );
@@ -153,7 +153,7 @@ void motionblur_deinit( bopti_image_t *screen );
 void MotionBlur( bopti_image_t *screen );
 
 
-/* EFFECT #15 : FIRE */
+/* EFFECT #16 : FIRE */
 
 char *fire_text( void );
 void fire_init( bopti_image_t *screen );
@@ -161,4 +161,13 @@ void fire_update( bopti_image_t *screen, float dt );
 void fire_render( bopti_image_t *screen );
 void fire_deinit( bopti_image_t *screen );
 
+
+/* EFFECT #17 : DOTTED TEXTURED FLAG */
+
+char *dotflag_text( void );
+void dotflag_init( bopti_image_t *screen );
+void dotflag_update( bopti_image_t *screen, float dt );
+void dotflag_render( bopti_image_t *screen );
+void dotflag_deinit( bopti_image_t *screen );
+
 #endif

src/main.cpp

@@ -24,17 +24,17 @@
 #include <string>
 
 
-#define TOTAL_NB_EFFECT 16
+#define TOTAL_NB_EFFECT 17
 typedef void (*PtrToFunc)( bopti_image_t * );
 typedef void (*PtrToFuncDt)( bopti_image_t *, float );
 typedef char* (*PtrTextFunc)( void );
 
 
-PtrTextFunc Effect_Text[] = { &fire_text, &rotatesphere_text, &starfield_text, &motionblur_text, &moire_text, &linemorph_text, &spline_text, &splineblur_text, &rotozoom_text, &plasma_text, &morph_text, &lens_text, &firecube_text, &matrix_text, &morphfire_text, &raindrops_text };
-PtrToFunc Effects_Init[] = { &fire_init, &rotatesphere_init, &starfield_init, &motionblur_init, &moire_init, &linemorph_init, &spline_init, &splineblur_init, &rotozoom_init, &plasma_init, &morph_init, &lens_init, &firecube_init, &matrix_init, &morphfire_init, &raindrops_init };
-PtrToFuncDt Effects_Update[] = { &fire_update, &rotatesphere_update, &starfield_update, &motionblur_update, &moire_update, &linemorph_update, &spline_update, &splineblur_update, &rotozoom_update, &plasma_update, &morph_update, &lens_update, &firecube_update, &matrix_update, &morphfire_update, &raindrops_update };
-PtrToFunc Effects_Render[] = { &fire_render, &rotatesphere_render, &starfield_render, &motionblur_render, &moire_render, &linemorph_render, &spline_render, &splineblur_render, &rotozoom_render, &plasma_render, &morph_render, &lens_render, &firecube_render, &matrix_render, &morphfire_render, &raindrops_render };
-PtrToFunc Effects_DeInit[] = { &fire_deinit, &rotatesphere_deinit, &starfield_deinit, &motionblur_deinit, &moire_deinit, &linemorph_deinit, &spline_deinit, &splineblur_deinit, &rotozoom_deinit, &plasma_deinit, &morph_deinit, &lens_deinit, &firecube_deinit, &matrix_deinit, &morphfire_deinit, &raindrops_deinit };
+PtrTextFunc Effect_Text[] = { &fire_text, &dotflag_text, &rotatesphere_text, &starfield_text, &motionblur_text, &moire_text, &linemorph_text, &spline_text, &splineblur_text, &rotozoom_text, &plasma_text, &morph_text, &lens_text, &firecube_text, &matrix_text, &morphfire_text, &raindrops_text };
+PtrToFunc Effects_Init[] = { &fire_init, &dotflag_init, &rotatesphere_init, &starfield_init, &motionblur_init, &moire_init, &linemorph_init, &spline_init, &splineblur_init, &rotozoom_init, &plasma_init, &morph_init, &lens_init, &firecube_init, &matrix_init, &morphfire_init, &raindrops_init };
+PtrToFuncDt Effects_Update[] = { &fire_update, &dotflag_update, &rotatesphere_update, &starfield_update, &motionblur_update, &moire_update, &linemorph_update, &spline_update, &splineblur_update, &rotozoom_update, &plasma_update, &morph_update, &lens_update, &firecube_update, &matrix_update, &morphfire_update, &raindrops_update };
+PtrToFunc Effects_Render[] = { &fire_render, &dotflag_render, &rotatesphere_render, &starfield_render, &motionblur_render, &moire_render, &linemorph_render, &spline_render, &splineblur_render, &rotozoom_render, &plasma_render, &morph_render, &lens_render, &firecube_render, &matrix_render, &morphfire_render, &raindrops_render };
+PtrToFunc Effects_DeInit[] = { &fire_deinit, &dotflag_deinit, &rotatesphere_deinit, &starfield_deinit, &motionblur_deinit, &moire_deinit, &linemorph_deinit, &spline_deinit, &splineblur_deinit, &rotozoom_deinit, &plasma_deinit, &morph_deinit, &lens_deinit, &firecube_deinit, &matrix_deinit, &morphfire_deinit, &raindrops_deinit };
 int current_effect = 0;
 
 

src/utilities/3Dtransform.h

@@ -2,6 +2,7 @@
 #define THREE_D_TRANSFORM
 
 #include <num/num.h>
+#include <sys/types.h>
 
 
 typedef struct
@@ -14,6 +15,7 @@ typedef struct
   libnum::num32 rz;
   int16_t sx;
   int16_t sy;
+  int8_t color;
 } Vertex3D;