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[Change] Puffs of nebulae now look more visually pleasing.

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This commit is contained in:
Allanis 2013-07-22 17:58:44 +01:00
parent 497081b3ed
commit cc37706fb1
2 changed files with 23 additions and 21 deletions
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28
src/nebulae.c
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@ -43,7 +43,6 @@ static glTexture* nebu_pufftexs[NEBULAE_PUFFS];
/* Puff handling. */
typedef struct NebulaePuff_ {
double x, y; /* Position. */
double a, va; /* Alpha, alpha velocity. */
double height; /* Height vs player. */
int tex; /* Texture. */
} NebulaePuff;
@ -256,13 +255,15 @@ void nebu_renderOverlay(const double dt) {
#define ANG45 0.70710678118654757
#define COS225 0.92387953251128674
#define SIN225 0.38268343236508978
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated(gui_xoff+shake_pos.x, gui_yoff+shake_pos.y, 0.);
/* Render the puffs. */
nebu_renderPuffs(dt, 0);
/* Prepare the matrix. */
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated(gui_xoff+shake_pos.x, gui_yoff+shake_pos.y, 0.);
/* Mask for area player can still see (partially). */
glShadeModel(GL_SMOOTH);
glBegin(GL_TRIANGLE_FAN);
@ -345,11 +346,6 @@ void nebu_renderOverlay(const double dt) {
/* Render the puffs. */
void nebu_renderPuffs(const double dt, int below_player) {
int i;
glColour cPuff;
cPuff.r = cPurple.r;
cPuff.g = cPurple.g;
cPuff.b = cPurple.b;
for(i = 0; i < nebu_npuffs; i++) {
if((below_player && (nebu_puffs[i].height < 1.)) ||
@ -357,14 +353,11 @@ void nebu_renderPuffs(const double dt, int below_player) {
/* Calculate new position. */
if(!paused) {
nebu_puffs[i].x -= player->solid->vel.x * nebu_puffs[i].height * dt;
nebu_puffs[i].y -= player->solid->vel.y * nebu_puffs[i].height * dt;
/* TODO: WTF?!? */
/*nebu_puffs[i].x -= player->solid->vel.x * nebu_puffs[i].height * dt;*/
/*nebu_puffs[i].y -= player->solid->vel.y * nebu_puffs[i].height * dt;*/
}
/* Calculate new alpha. */
/*nebu_puffs[i].a += nebu_puffs[i].va * dt;*/
cPuff.a = nebu_puffs[i].a;
/* Check boundaries. */
if(nebu_puffs[i].x > SCREEN_W + NEBULAE_PUFF_BUFFER)
nebu_puffs[i].x = -NEBULAE_PUFF_BUFFER;
@ -377,7 +370,7 @@ void nebu_renderPuffs(const double dt, int below_player) {
/* Render. */
gl_blitStatic(nebu_pufftexs[nebu_puffs[i].tex],
nebu_puffs[i].x, nebu_puffs[i].y, &cPuff);
nebu_puffs[i].x, nebu_puffs[i].y, &cPurple);
}
}
}
@ -398,8 +391,7 @@ void nebu_prep(double density, double volatility) {
SCREEN_W + NEBULAE_PUFF_BUFFER);
nebu_puffs[i].y = (double)RNG(-NEBULAE_PUFF_BUFFER,
SCREEN_H + NEBULAE_PUFF_BUFFER);
nebu_puffs[i].a = (double)RNG(20,100)/100.;
nebu_puffs[i].height = RNGF()*2.;
nebu_puffs[i].height = RNGF() + 0.2;
}
}

16
src/perlin.c
View File

@ -243,7 +243,8 @@ float* noise_genNebulaeMap(const int w, const int h, const int n, float rug) {
/* Generate tiny nebuale puffs */
float* noise_genNebulaePuffMap(const int w, const int h, float rug) {
int x, y;
int x, y, hw, hh;
float d;
float f[3];
int octaves;
float hurst;
@ -271,12 +272,20 @@ float* noise_genNebulaePuffMap(const int w, const int h, float rug) {
/* Start to create the nebulae. */
max = 0.;
f[2] = 0.;
hw = w/2;
hh = h/2;
d = (float)MIN(hw, hh);
for(y = 0; y < h; y++) {
f[1] = zoom * (float)y / (float)h;
for(x = 0; x < w; x++) {
f[0] = zoom * (float)x / (float)w;
value = noise_turbulence(noise, f, octaves);
/* Make value also depend on distance from center. */
value *= (d - 1. - sqrtf((float)((x-hw)*(x-hw)+(y-hh)*(y-hh))))/d;
if(value < 0.) value = 0.;
if(max < value) max = value;
nebulae[y*w + x] = value;
@ -284,10 +293,11 @@ float* noise_genNebulaePuffMap(const int w, const int h, float rug) {
}
/* Post filtering. */
value = 1. - max;
/*value = 1. - max;
for(y = 0; y < h; y++)
for(x = 0; x < w; x++)
nebulae[y*w + x] += value;
if(nebulae[y*w+x] > 0.)
nebulae[y*w + x] += value;*/
/* Clean up. */
noise_delete(noise);