Moved rendering the titlescreen to it's own function.
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0ac4fd0989
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109
Spacewar.c
109
Spacewar.c
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@ -125,62 +125,75 @@ int main(int argc, char ** argv)
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SDL_Rect textDestination = {0, 0, text->w, text->h};
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SDL_Texture * textTexture = SDL_CreateTextureFromSurface(renderer, text);
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// Prep the titlescreen struct:
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SpacewarTitlescreen titlescreen;
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titlescreen.starfieldTexture = starfieldTexture;
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titlescreen.starfieldRectangle = &starfieldRect;
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titlescreen.xScroll = 0;
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titlescreen.window = window;
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titlescreen.renderer = renderer;
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titlescreen.titleRectangle = &titleRect;
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titlescreen.titleTexture = titleTexture;
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titlescreen.textTexture = textTexture;
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titlescreen.textRectangle = &textDestination;
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int scrollX = 0, titleAlpha = 0, textAlpha = 0;
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// Render the title text:
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while(!inputSelected)
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{
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// Draw the title screen:
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SDL_GetWindowSize(window, &width, &height);
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titleRect.x = (width/2) - (317/2);
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titleRect.y = (height/2) - 51;
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textDestination.x = (width/2) - (textDestination.w / 2);
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textDestination.y = (height/2) + (textDestination.h) * 2;
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/* // Draw the title screen: */
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/* SDL_GetWindowSize(window, &width, &height); */
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/* titleRect.x = (width/2) - (317/2); */
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/* titleRect.y = (height/2) - 51; */
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/* textDestination.x = (width/2) - (textDestination.w / 2); */
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/* textDestination.y = (height/2) + (textDestination.h) * 2; */
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// Set the colour to black:
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
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/* // Set the colour to black: */
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/* SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); */
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// Clear the screen, filling it with black:
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SDL_RenderClear(renderer);
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/* // Clear the screen, filling it with black: */
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/* SDL_RenderClear(renderer); */
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starfieldRect.x = 0 - scrollX++;
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starfieldRect.y = 0;
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while(starfieldRect.x <= (width + 800))
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{
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while(starfieldRect.y <= (height + 800))
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{
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SDL_RenderCopy(renderer, starfieldTexture, NULL, &starfieldRect);
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starfieldRect.y += 800;
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}
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starfieldRect.y = 0;
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starfieldRect.x += 800;
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}
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/* starfieldRect.x = 0 - scrollX++; */
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/* starfieldRect.y = 0; */
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/* while(starfieldRect.x <= (width + 800)) */
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/* { */
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/* while(starfieldRect.y <= (height + 800)) */
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/* { */
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/* SDL_RenderCopy(renderer, starfieldTexture, NULL, &starfieldRect); */
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/* starfieldRect.y += 800; */
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/* } */
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/* starfieldRect.y = 0; */
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/* starfieldRect.x += 800; */
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/* } */
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if(scrollX == 801)
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{
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scrollX = 0;
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}
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SDL_SetTextureAlphaMod(titleTexture, titleAlpha);
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SDL_RenderCopy(renderer, titleTexture, NULL, &titleRect);
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if(titleAlpha < 254)
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{
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titleAlpha += 10;
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}
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if(titleAlpha >= 254)
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{
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titleAlpha = 254;
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}
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SDL_SetTextureAlphaMod(textTexture, textAlpha);
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SDL_RenderCopy(renderer, textTexture, NULL, &textDestination);
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if(textAlpha < 254 && titleAlpha == 254)
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{
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textAlpha += 20;
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}
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if(textAlpha >= 254)
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{
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textAlpha = 254;
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}
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/* if(scrollX == 801) */
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/* { */
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/* scrollX = 0; */
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/* } */
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/* SDL_SetTextureAlphaMod(titleTexture, titleAlpha); */
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/* SDL_RenderCopy(renderer, titleTexture, NULL, &titleRect); */
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/* if(titleAlpha < 254) */
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/* { */
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/* titleAlpha += 10; */
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/* } */
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/* if(titleAlpha >= 254) */
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/* { */
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/* titleAlpha = 254; */
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/* } */
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/* SDL_SetTextureAlphaMod(textTexture, textAlpha); */
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/* SDL_RenderCopy(renderer, textTexture, NULL, &textDestination); */
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/* if(textAlpha < 254 && titleAlpha == 254) */
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/* { */
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/* textAlpha += 20; */
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/* } */
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/* if(textAlpha >= 254) */
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/* { */
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/* textAlpha = 254; */
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/* } */
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SDL_RenderPresent(renderer);
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drawTitleScreen(&titlescreen);
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SDL_PumpEvents();
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SDL_GetKeyboardState(&keyCount);
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@ -434,5 +447,5 @@ int main(int argc, char ** argv)
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}
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// ========================================================================================================
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// Local Variables:
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// compile-command: "gcc `sdl2-config --libs --cflags` Spacewar.c spacewarPlayer.c -lSDL2_image -lm -o 'Spacewar!'"
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// compile-command: "gcc `sdl2-config --libs --cflags` Spacewar.c spacewarPlayer.c spacewarGraphics.c -lSDL2_image -lSDL2_ttf -lm -o 'Spacewar!'"
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// End:
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@ -0,0 +1,79 @@
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_image.h>
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#include <SDL2/SDL_timer.h>
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#include <SDL2/SDL_ttf.h>
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#include <stdint.h>
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#include "spacewarGraphics.h"
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void drawTitleScreen(SpacewarTitlescreen * titlescreen)
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{
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// Get the current size of the window:
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int width = 0, height = 0;
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SDL_GetWindowSize(titlescreen->window, &width, &height);
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// Position the elements on-screen:
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titlescreen->titleRectangle->x = (width/2) - (titlescreen->titleRectangle->w / 2);
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titlescreen->titleRectangle->y = (height/2) - titlescreen->titleRectangle->h;
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titlescreen->textRectangle->x = (width/2) - (titlescreen->textRectangle->w / 2);
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titlescreen->textRectangle->y = (height/2) + (titlescreen->textRectangle->h * 2);
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// Set the renderer colour to black and clear the screen:
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SDL_SetRenderDrawColor(titlescreen->renderer, 0, 0, 0, 255);
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SDL_RenderClear(titlescreen->renderer);
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// Set the correct position to begin the starfield, and scroll it back for the next frame:
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titlescreen->starfieldRectangle->x = 0 - titlescreen->xScroll++;
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titlescreen->starfieldRectangle->y = 0;
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// Draw the starfield by tiling the starfield texture:
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while (titlescreen->starfieldRectangle->x <= (width + titlescreen->starfieldRectangle->w))
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{
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// Go down, covering a column of the screen:
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while(titlescreen->starfieldRectangle->y <= (height + titlescreen->starfieldRectangle->h))
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{
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SDL_RenderCopy(titlescreen->renderer, titlescreen->starfieldTexture, NULL,
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titlescreen->starfieldRectangle);
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titlescreen->starfieldRectangle->y += titlescreen->starfieldRectangle->h;
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}
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// Back to the top, move over one texture width:
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titlescreen->starfieldRectangle->y = 0;
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titlescreen->starfieldRectangle->x += titlescreen->starfieldRectangle->w;
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}
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// Reset the xScroll if it goes farther than a texture width away:
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if (titlescreen->xScroll == titlescreen->starfieldRectangle->w + 1)
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{
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titlescreen->xScroll = 0;
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}
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// Set the opacity of the logo so we can fade it in:
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if (titlescreen->titleAlpha < 254)
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{
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titlescreen->titleAlpha += 10;
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}
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if (titlescreen->titleAlpha >= 254)
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{
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titlescreen->titleAlpha = 254;
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}
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SDL_SetTextureAlphaMod(titlescreen->titleTexture, titlescreen->titleAlpha);
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// Set the opacity of the text so we can fade it in after we fade in the logo:
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if (titlescreen->textAlpha < 254 && titlescreen->titleAlpha == 254)
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{
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titlescreen->textAlpha += 10;
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}
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if (titlescreen->textAlpha >= 254)
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{
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titlescreen->textAlpha = 254;
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}
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SDL_SetTextureAlphaMod(titlescreen->textTexture, titlescreen->textAlpha);
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// Display the logo and text:
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SDL_RenderCopy(titlescreen->renderer, titlescreen->titleTexture, NULL, titlescreen->titleRectangle);
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SDL_RenderCopy(titlescreen->renderer, titlescreen->textTexture, NULL, titlescreen->textRectangle);
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// Display to the renderer:
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SDL_RenderPresent(titlescreen->renderer);
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}
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@ -2,6 +2,17 @@
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#define SPACEWAR_GRAPHICS_H
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#include <SDL2/SDL.h>
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typedef struct SpacewarTitlescreen
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{
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SDL_Window * window;
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SDL_Renderer * renderer;
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uint16_t xScroll, titleAlpha, textAlpha;
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SDL_Texture * titleTexture, * textTexture, * starfieldTexture;
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SDL_Rect * titleRectangle, * textRectangle, * starfieldRectangle;
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} SpacewarTitlescreen;
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void drawTitleScreen(SpacewarTitlescreen * titlescreen);
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static inline void DrawCircle(SDL_Renderer * renderer, int32_t centreX, int32_t centreY, int32_t radius)
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{
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const int32_t diameter = (radius * 2);
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