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Getting texture atlas to animate

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This commit is contained in:
Joseph Ferano 2023-10-25 21:52:29 +07:00
parent e1e41654e6
commit dc054cacfb
3 changed files with 25 additions and 14 deletions
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14
main.c
View File

@ -6,6 +6,7 @@
#include "cglm/cglm.h"
#include "lib.h"
#include "stb_image.h"
#include "rendering.h"
#include "libcyaml/include/cyaml/cyaml.h"
#define PI 3.14159f
@ -18,6 +19,7 @@ typedef struct State {
float camY;
float px;
float py;
int spriteY;
} State;
void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
@ -33,6 +35,12 @@ void processInput(GLFWwindow *window, State* state) {
}
float amount = 1.0f;
if (glfwGetKey(window, GLFW_KEY_J) == GLFW_RELEASE) {
state->spriteY -= 1;
}
if (glfwGetKey(window, GLFW_KEY_K) == GLFW_RELEASE) {
state->spriteY += 1;
}
if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS) {
state->camY -= amount;
}
@ -120,7 +128,8 @@ int main(void) {
unsigned int textureID;
int width, height, channels;
char* data = (char*)stbi_load("assets/idle.png", &width, &height, &channels, 4);
char* data = (char*)stbi_load("assets/player.png", &width, &height, &channels, 4);
// char* data = (char*)stbi_load("imports/sprites/player/idle.png", &width, &height, &channels, 4);
if (data == NULL) {
fprintf(stderr, "Could not load texture\n");
return -1;
@ -205,13 +214,12 @@ int main(void) {
glUniform1f(location, spriteX);
location = glGetUniformLocation(shaderProgram, "spriteY");
glUniform1f(location, state.py);
glUniform1f(location, state.camY);
glUniform1i(glGetUniformLocation(shaderProgram, "image"), 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textureID);
glBindVertexArray(VAO);
glDrawArrays(GL_TRIANGLES, 0, 6);
glBindVertexArray(0);

16
shaders/main.frag
View File

@ -8,7 +8,17 @@ uniform float spriteX;
uniform float spriteY;
void main() {
float x = TexCoords.x / 10 + spriteX;
float y = TexCoords.y;
color = vec4(spriteColor, 1.0f) * texture(image, vec2(x, y));
float r = (48.0 / 512.0);
float x = TexCoords.x * r + (int(spriteX * 10)) * r;
// float y = TexCoords.y * r + (int(spriteY * 10)) * r;
float y = TexCoords.y * r;
float minb = 0.005;
float maxb = 0.995;
if (TexCoords.x <= minb || TexCoords.x >= maxb
|| TexCoords.y <= minb || TexCoords.y >= maxb) {
color = vec4(1,0,0,1);
} else {
color = texture(image, vec2(x, y));
}
}

9
tools/texturepacker.c
View File

@ -176,14 +176,6 @@ int sdlTest(Image* images, int image_count, TexRect* tex_rects) {
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
}
// unsigned char converted[512 * 512 * 4];
// for (int i = 0; i < 512 * 512; i++) {
// converted[i*4+0] = (pixels[i] >> 24) & 0xff;
// converted[i*4+1] = (pixels[i] >> 16) & 0xff;
// converted[i*4+2] = (pixels[i] >> 8 ) & 0xff;
// converted[i*4+3] = (pixels[i] ) & 0xff;
// }
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
@ -250,6 +242,7 @@ int main(int argc, char* argv[]) {
for (int i = 0; i < imageCount; i++) {
stbi_image_free(images[i].imageData);
}
free(buf);
free(images);
free(texRects);
return 0;