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Spacewar
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Added a starfield which scrolls with player movement.

This commit is contained in:
Barra Ó Catháin 2023-03-21 21:39:35 +00:00
parent d363898236
commit 00f00b980a
2 changed files with 62 additions and 3 deletions
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Images/Starfield.png Normal file
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65
Spacewar.c
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@ -80,7 +80,10 @@ int main(int argc, char ** argv)
// Initialize image loading:
IMG_Init(IMG_INIT_PNG);
// Initialize font support:
TTF_Init();
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2");
SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
@ -90,6 +93,8 @@ int main(int argc, char ** argv)
// Create an SDL window and rendering context in that window:
SDL_Window * window = SDL_CreateWindow("SDL_TEST", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 700, 700, 0);
SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, rendererFlags);
// Set some properties for the window:
SDL_SetWindowResizable(window, SDL_TRUE);
SDL_SetWindowTitle(window, "Spacewar!");
@ -99,10 +104,14 @@ int main(int argc, char ** argv)
// Load the title screen:
SDL_Texture * titleTexture = IMG_LoadTexture(renderer, "./Images/Title.png");
SDL_Rect titleRect;
titleRect.w = 317;
titleRect.h = 51;
SDL_QueryTexture(titleTexture, NULL, NULL, NULL, &titleRect.h);
SDL_QueryTexture(titleTexture, NULL, NULL, &titleRect.w, NULL);
SDL_Texture * starfieldTexture = IMG_LoadTexture(renderer, "./Images/Starfield.png");
SDL_Rect starfieldRect;
SDL_QueryTexture(starfieldTexture, NULL, NULL, NULL, &starfieldRect.h);
SDL_QueryTexture(starfieldTexture, NULL, NULL, &starfieldRect.w, NULL);
//
TTF_Font * font = TTF_OpenFont("./Robtronika.ttf", 12);
SDL_Color white = {255, 255, 255};
@ -116,6 +125,7 @@ int main(int argc, char ** argv)
SDL_Rect textDestination = {0, 0, text->w, text->h};
SDL_Texture * textTexture = SDL_CreateTextureFromSurface(renderer, text);
int scrollX = 0;
// Render the title text:
while(!inputSelected)
{
@ -132,6 +142,23 @@ int main(int argc, char ** argv)
// Clear the screen, filling it with black:
SDL_RenderClear(renderer);
starfieldRect.x = 0 - scrollX++;
starfieldRect.y = 0;
while(starfieldRect.x <= (width + 800))
{
while(starfieldRect.y <= (height + 800))
{
SDL_RenderCopy(renderer, starfieldTexture, NULL, &starfieldRect);
starfieldRect.y += 800;
}
starfieldRect.y = 0;
starfieldRect.x += 800;
}
if(scrollX == 801)
{
scrollX = 0;
}
SDL_RenderCopy(renderer, titleTexture, NULL, &titleRect);
SDL_RenderCopy(renderer, textTexture, NULL, &textDestination);
SDL_RenderPresent(renderer);
@ -166,6 +193,7 @@ int main(int argc, char ** argv)
bool inputSelected = false;
// Render the title text:
int scrollX = 0;
while(!inputSelected)
{
// Draw the title screen:
@ -181,6 +209,24 @@ int main(int argc, char ** argv)
// Clear the screen, filling it with black:
SDL_RenderClear(renderer);
starfieldRect.x = 0 - scrollX++;
starfieldRect.y = 0;
while(starfieldRect.x <= (width + 800))
{
while(starfieldRect.y <= (height + 800))
{
SDL_RenderCopy(renderer, starfieldTexture, NULL, &starfieldRect);
starfieldRect.y += 800;
}
starfieldRect.y = 0;
starfieldRect.x += 800;
}
if(scrollX == 801)
{
scrollX = 0;
}
SDL_RenderCopy(renderer, titleTexture, NULL, &titleRect);
SDL_RenderCopy(renderer, textTexture, NULL, &textDestination);
SDL_RenderPresent(renderer);
@ -312,6 +358,19 @@ int main(int argc, char ** argv)
// Clear the screen, filling it with black:
SDL_RenderClear(renderer);
starfieldRect.x = -900 - (long)shipA.position.xComponent % 800 - (shipA.velocity.xComponent * 15);
starfieldRect.y = -900 - (long)shipA.position.yComponent % 800 - (shipA.velocity.yComponent * 15);
while(starfieldRect.x <= (width + 800))
{
while(starfieldRect.y <= (height + 800))
{
SDL_RenderCopy(renderer, starfieldTexture, NULL, &starfieldRect);
starfieldRect.y += 800;
}
starfieldRect.y = -900 - (long)shipA.position.yComponent % 800 - (shipA.velocity.yComponent * 15);
starfieldRect.x += 800;
}
// Draw the ship:
SDL_RenderCopyEx(renderer, currentTexture, NULL, &shipA.rectangle,
angleBetweenVectors(&shipA.engine, &upVector) + 90, NULL, 0);