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[Add] space_renderOverlay().

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This commit is contained in:
Allanis 2013-07-21 11:13:53 +01:00
parent 862ef7759b
commit 42a57d09e9
5 changed files with 121 additions and 19 deletions
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1
src/lephisto.c
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@ -369,6 +369,7 @@ static void render_all(void) {
pilots_render();
weapons_render(WEAPON_LAYER_FG);
spfx_render(SPFX_LAYER_BACK);
space_renderOverlay();
/* FG. */
player_render();
spfx_render(SPFX_LAYER_FRONT);

89
src/nebulae.c
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@ -8,6 +8,7 @@
#include "opengl.h"
#include "lfile.h"
#include "rng.h"
#include "menu.h"
#include "perlin.h"
#define NEBU_DT_MAX 5.
@ -15,6 +16,8 @@
#define NEBULAE_Z 16 /* Z plane. */
#define NEBULAE_PATH "gen/nebu_%02d.png"
extern double gui_xoff, gui_yoff;
/* The nebulae textures. */
static GLuint nebu_textures[NEBULAE_Z];
static int nebu_w = 0;
@ -134,6 +137,8 @@ void nebu_render(void) {
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, nebu_textures[cur_nebu[1]]);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
/* Texture 1. */
glActiveTexture(GL_TEXTURE1);
glEnable(GL_TEXTURE_2D);
@ -182,7 +187,6 @@ void nebu_render(void) {
glVertex2d(-SCREEN_W/2., SCREEN_H/2.);
glEnd();
/* Clean up. */
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glDisable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
@ -193,6 +197,89 @@ void nebu_render(void) {
gl_checkErr();
}
void nebu_renderOverlay(double density) {
#define ANG45 0.70710678118654757
#define COS225 0.92387953251128674
#define SIN225 0.38268343236508978
glShadeModel(GL_SMOOTH);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated(gui_xoff, gui_yoff, 0.);
/* Stuff player partially sees. */
glBegin(GL_TRIANGLE_FAN);
ACOLOUR(cPurple, 0.);
glVertex2d(0., 0.);
ACOLOUR(cPurple, 1.);
glVertex2d(-density, 0.);
glVertex2d(-density*COS225, density*SIN225);
glVertex2d(-density*ANG45, density*ANG45);
glVertex2d(-density*SIN225, density*COS225);
glVertex2d( 0., density);
glVertex2d( density*SIN225, density*COS225);
glVertex2d( density*ANG45, density*ANG45);
glVertex2d( density*COS225, density*SIN225);
glVertex2d( density, 0.);
glVertex2d( density*COS225, -density*SIN225);
glVertex2d( density*ANG45, -density*ANG45);
glVertex2d( density*SIN225, -density*COS225);
glVertex2d( 0., -density);
glVertex2d(-density*SIN225, -density*COS225);
glVertex2d(-density*ANG45, -density*ANG45);
glVertex2d(-density*COS225, -density*SIN225);
glVertex2d(-density, 0.);
glEnd(); /* GL_TRIANGLE_FAN */
glShadeModel(GL_FLAT);
/* Stuff player can't see. */
glBegin(GL_TRIANGLE_STRIP);
ACOLOUR(cPurple, 1.);
/* Start at the left. */
glVertex2d(-density, 0.);
glVertex2d(-density*COS225, density*SIN225);
glVertex2d(-SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
glVertex2d(-density*ANG45, density*ANG45);
glVertex2d(-density*SIN225, density*COS225);
glVertex2d(-SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
glVertex2d( SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
/* Move to the top. */
glVertex2d( 0., density);
glVertex2d( density*SIN225, density*COS225);
glVertex2d( SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
glVertex2d( density*ANG45, density*ANG45);
glVertex2d( density*COS225, density*SIN225);
glVertex2d( SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
/* Down to the right. */
glVertex2d( density, 0.);
glVertex2d( SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
glVertex2d( density*COS225, -density*SIN225);
glVertex2d( SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
glVertex2d( density*ANG45, -density*ANG45);
glVertex2d( density*SIN225, -density*COS225);
glVertex2d( SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
glVertex2d( -SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
/* At the bottom. */
glVertex2d( 0., -density);
glVertex2d(-density*SIN225, -density*COS225);
glVertex2d(-SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
glVertex2d(-density*ANG45, -density*ANG45);
glVertex2d(-density*COS225, -density*SIN225);
glVertex2d(-SCREEN_W/2.-gui_xoff, -SCREEN_H/2.-gui_yoff);
/* Back to origin. */
glVertex2d(-density, 0.);
glVertex2d(-SCREEN_W/2.-gui_xoff, SCREEN_H/2.-gui_yoff);
glEnd(); /* GL_QUAD_STRIP */
glPopMatrix();
gl_checkErr();
#undef ANG45
#undef COS225
#undef SIN225
}
/* Force generation of new nebulae. */
void nebu_forceGenerate(void) {
nebu_w = nebu_h = -9;

6
src/nebulae.h
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@ -1,11 +1,13 @@
#pragma once
/* Try to find nebulae to load, or generate if there isn't any. */
/* Init/Exit. */
void nebu_init(void);
void nebu_exit(void);
/* Render. */
void nebu_render(void);
void nebu_renderOverlay(double density);
/* Misc. */
void nebu_forceGenerate(void);

10
src/space.c
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@ -792,8 +792,16 @@ int space_load(void) {
/* Render the system. -- Just playing god now. */
void space_render(double dt) {
if(cur_system->nebu_density > 0.)
nebu_render();
else
space_renderStars(dt);
/* nebu_render(); */
}
/* Render the overlay. */
void space_renderOverlay(void) {
if(cur_system->nebu_density > 0.)
nebu_renderOverlay(cur_system->nebu_density);
}
/* Render stars. */

4
src/space.h
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@ -102,6 +102,9 @@ typedef struct StarSystem_ {
int* jumps; /* Adjacent star system index number. */
int njumps; /* Number of adjacent jumps. */
double nebu_density; /* Nebulae density. */
double nebu_volatility; /* Nebulae volatility - Not used yet. */
unsigned int flags; /* Flags for system properties. */
} StarSystem;
@ -118,6 +121,7 @@ Planet* planet_get(char* planetname);
/* Render. */
void space_render(double dt);
void space_renderOverlay(void);
void planets_render(void);
/* Update. */