From: John Tsiombikas <jtsiomb@census.gr>
Date: Tue, 3 Sep 2019 10:20:10 +0000 (+0300)
Subject: census logo
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=bootcensus;a=commitdiff_plain;h=22dd4db1a4ff756f76bdd87062c2252fe3091228

census logo
---

diff --git a/src/census/3dgfx.c b/src/census/3dgfx.c
index 9058d28..a028262 100644
--- a/src/census/3dgfx.c
+++ b/src/census/3dgfx.c
@@ -585,20 +585,22 @@ void g3d_normal(float x, float y, float z)
 	st->imm_curv.nz = z;
 }
 
+#define CLAMP(x, a, b)	((x) < (a) ? (a) : ((x) > (b) ? (b) : (x)))
+
 void g3d_color3b(unsigned char r, unsigned char g, unsigned char b)
 {
-	st->imm_curv.r = r;
-	st->imm_curv.g = g;
-	st->imm_curv.b = b;
+	st->imm_curv.r = CLAMP(r, 0, 255);
+	st->imm_curv.g = CLAMP(g, 0, 255);
+	st->imm_curv.b = CLAMP(b, 0, 255);
 	st->imm_curv.a = 255;
 }
 
 void g3d_color4b(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
 {
-	st->imm_curv.r = r;
-	st->imm_curv.g = g;
-	st->imm_curv.b = b;
-	st->imm_curv.a = a;
+	st->imm_curv.r = CLAMP(r, 0, 255);
+	st->imm_curv.g = CLAMP(g, 0, 255);
+	st->imm_curv.b = CLAMP(b, 0, 255);
+	st->imm_curv.a = CLAMP(a, 0, 255);
 }
 
 void g3d_color3f(float r, float g, float b)
@@ -606,9 +608,9 @@ void g3d_color3f(float r, float g, float b)
 	int ir = r * 255.0f;
 	int ig = g * 255.0f;
 	int ib = b * 255.0f;
-	st->imm_curv.r = ir > 255 ? 255 : ir;
-	st->imm_curv.g = ig > 255 ? 255 : ig;
-	st->imm_curv.b = ib > 255 ? 255 : ib;
+	st->imm_curv.r = CLAMP(ir, 0, 255);
+	st->imm_curv.g = CLAMP(ig, 0, 255);
+	st->imm_curv.b = CLAMP(ib, 0, 255);
 	st->imm_curv.a = 255;
 }
 
@@ -618,10 +620,10 @@ void g3d_color4f(float r, float g, float b, float a)
 	int ig = g * 255.0f;
 	int ib = b * 255.0f;
 	int ia = a * 255.0f;
-	st->imm_curv.r = ir > 255 ? 255 : ir;
-	st->imm_curv.g = ig > 255 ? 255 : ig;
-	st->imm_curv.b = ib > 255 ? 255 : ib;
-	st->imm_curv.a = ia > 255 ? 255 : ia;
+	st->imm_curv.r = CLAMP(ir, 0, 255);
+	st->imm_curv.g = CLAMP(ig, 0, 255);
+	st->imm_curv.b = CLAMP(ib, 0, 255);
+	st->imm_curv.a = CLAMP(ia, 0, 255);
 }
 
 void g3d_texcoord(float u, float v)
diff --git a/src/census/census.c b/src/census/census.c
index 1755133..724ab2a 100644
--- a/src/census/census.c
+++ b/src/census/census.c
@@ -1,11 +1,26 @@
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 #include "census.h"
+#include "logo.h"
+#include "timer.h"
 #include "3dgfx.h"
 #include "panic.h"
 
+static void draw_disc(float x, float y, float rad, int sub);
+static void draw_line(float x0, float y0, float x1, float y1, float rad);
+
+static int nverts = 256;
+static long start_time;
+
+#define LOOPTIME	1.45f
+
 void init_census(void *pixels, int xsz, int ysz)
 {
+	float aspect = (float)xsz / (float)ysz;
+
+	init_logo(0);
+
 	fb_pixels = pixels;
 	fb_width = xsz;
 	fb_height = ysz;
@@ -13,31 +28,95 @@ void init_census(void *pixels, int xsz, int ysz)
 	g3d_init();
 	g3d_framebuffer(xsz, ysz, fb_pixels);
 	g3d_polygon_mode(G3D_FLAT);
+
 	g3d_viewport(0, 0, xsz, ysz);
+	g3d_matrix_mode(G3D_PROJECTION);
+	g3d_load_identity();
+	g3d_scale(1.0f / aspect , 1.0f, 1.0f);
+
+	start_time = TICKS_TO_MSEC(nticks);
 }
 
 void draw_census(void)
 {
 	int i;
+	long msec = TICKS_TO_MSEC(nticks);
+	float t = (float)msec / 1000.0f;
+	float a[2], b[2], dt;
+	float anim, alpha, center_alpha;
+
 	memset(fb_pixels, 0, fb_width * fb_height * 4);
 
-	g3d_matrix_mode(G3D_MODELVIEW);
-	g3d_load_identity();
+	anim = fmod(t / 6.0f, LOOPTIME);
+	alpha = 1.0f - ((anim - (LOOPTIME - 0.075)) / 0.06f);
+	if(alpha < 0.0f) alpha = 0.0f;
+	if(alpha > 1.0f) alpha = 1.0f;
+
+	dt = (anim > 1.0f ? 1.0f : anim) / (float)(nverts - 1);
+
+	g3d_color4f(1, 1, 1, alpha);
+	for(i=0; i<nverts-1; i++) {
+		float t0 = (float)i * dt;
+		float t1 = (float)(i + 1) * dt;
+		eval_logo(a, t0);
+		eval_logo(b, t1);
+		draw_line(a[0], a[1], b[0], b[1], 0.02);
+	}
+
+	if(anim > 0.0f) {
+		eval_logo(a, 0);
+		draw_disc(a[0], a[1], 0.05, 22);
+	}
+	if(anim >= 1.0f) {
+		eval_logo(b, 1);
+		draw_disc(b[0], b[1], 0.05, 22);
+	}
+
+
+	center_alpha = 2.0 * (anim - 1.0f) / (LOOPTIME - 1.0f);
+	if(center_alpha > 0.4) {
+		g3d_color4f(0.8, 0, 0, center_alpha);
+		draw_disc(0, 0, 0.14, 30);
+	}
 
-	g3d_enable(G3D_BLEND);
+}
+
+static void draw_disc(float x, float y, float rad, int sub)
+{
+	int i;
+	float dt = 1.0f / (float)(sub - 1);
+	float da = dt * M_PI * 2.0;
 
-	g3d_color4b(64, 128, 255, 255);
-	for(i=0; i<2; i++) {
-		g3d_begin(G3D_QUADS);
-		g3d_vertex(-0.4, -0.5, 0);
-		g3d_vertex(0.6, -0.2, 0);
-		g3d_vertex(0, 0.8, 0);
-		g3d_vertex(-0.5, 0.6, 0);
-		g3d_end();
+	g3d_begin(G3D_TRIANGLES);
+	for(i=0; i<sub; i++) {
+		float theta = i * da;
 
-		g3d_translate(0.2, -0.2, 0);
-		g3d_color4b(255, 32, 255, 128);
+		g3d_vertex(x, y, 0);
+		g3d_vertex(cos(theta) * rad + x, sin(theta) * rad + y, 0);
+		g3d_vertex(cos(theta + da) * rad + x, sin(theta + da) * rad + y, 0);
 	}
+	g3d_end();
+}
+
+static void draw_line(float x0, float y0, float x1, float y1, float rad)
+{
+	float dx, dy, rx, ry, len;
+
+	dx = x1 - x0;
+	dy = y1 - y0;
+	len = sqrt(dx * dx + dy * dy);
 
-	g3d_disable(G3D_BLEND);
+	rx = rad * dy / len;
+	ry = -rad * dx / len;
+
+	draw_disc(x0, y0, rad, 12);
+	draw_disc(x1, y1, rad, 12);
+
+	g3d_begin(G3D_QUADS);
+	g3d_vertex(x0 + rx, y0 + ry, 0);
+	g3d_vertex(x1 + rx, y1 + ry, 0);
+	g3d_vertex(x1 - rx, y1 - ry, 0);
+	g3d_vertex(x0 - rx, y0 - ry, 0);
+	g3d_end();
 }
+