gles running
This commit is contained in:
parent
9cbcd7acca
commit
75dc9659dd
2 changed files with 146 additions and 103 deletions
140
fragment.glsl
140
fragment.glsl
|
|
@ -1,76 +1,80 @@
|
|||
#version 320 es
|
||||
|
||||
precision mediump float;
|
||||
|
||||
void main() {
|
||||
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
|
||||
uniform vec2 WindowSize;
|
||||
uniform float time;
|
||||
layout(location = 0) out vec4 color;
|
||||
|
||||
float rand(ivec2 co) {
|
||||
return fract(sin(dot(vec2(co), vec2(12.9898, 78.233))) * 43758.5453);
|
||||
}
|
||||
|
||||
float cell_size = 0.01;
|
||||
|
||||
//#version 330 core
|
||||
//out vec4 FragColor;
|
||||
//uniform vec2 WindowSize;
|
||||
//uniform float time;
|
||||
//
|
||||
//float rand(ivec2 co) {
|
||||
// return fract(sin(dot(co, vec2(12.9898, 78.233))) * 43758.5453);
|
||||
//}
|
||||
//
|
||||
//float cell_size = 0.01;
|
||||
//
|
||||
//#define PI 3.1415926538
|
||||
//
|
||||
//// whatever that corner contributes
|
||||
//float c_dot(vec2 point, vec2 corner) {
|
||||
// ivec2 c = ivec2(round(corner * 100));
|
||||
// float angle = rand(c) * 2*PI;
|
||||
// vec2 random_corner_vec = vec2(cos(angle), sin(angle));
|
||||
// vec2 offset = (point - corner) / cell_size;
|
||||
// float dot_product = dot(random_corner_vec, offset);
|
||||
// // for now just return something
|
||||
// return dot_product;
|
||||
//}
|
||||
//
|
||||
//float lerp(float a, float b, float x) {
|
||||
// return a + x*(b-a);
|
||||
//}
|
||||
//
|
||||
//// better than built in smoothstep.
|
||||
//float fade(float t) {
|
||||
// return ((6*t - 15)*t + 10)*t*t*t;
|
||||
//}
|
||||
#define PI 3.1415926538
|
||||
|
||||
// whatever that corner contributes
|
||||
float c_dot(vec2 point, vec2 corner) {
|
||||
ivec2 c = ivec2(round(corner * 100.0));
|
||||
float angle = rand(c) * 2.0*PI;
|
||||
vec2 random_corner_vec = vec2(cos(angle), sin(angle));
|
||||
vec2 offset = (point - corner) / cell_size;
|
||||
float dot_product = dot(random_corner_vec, offset);
|
||||
// for now just return something
|
||||
return dot_product;
|
||||
}
|
||||
|
||||
float lerp(float a, float b, float x) {
|
||||
return a + x*(b-a);
|
||||
}
|
||||
|
||||
// better than built in smoothstep.
|
||||
float fade(float t) {
|
||||
return ((6.0*t - 15.0)*t + 10.0)*t*t*t;
|
||||
}
|
||||
|
||||
void main() {
|
||||
// We'll make origin in the top-left.
|
||||
vec2 uv = gl_FragCoord.xy / WindowSize;
|
||||
uv.y = 1.0 - uv.y;
|
||||
vec2 grid_edge_offset = mod(uv, cell_size);
|
||||
// c: corner
|
||||
vec2 c_tl = uv - grid_edge_offset;
|
||||
vec2 c_tr = uv - grid_edge_offset + vec2(cell_size, 0);
|
||||
vec2 c_bl = uv - grid_edge_offset + vec2(0, cell_size);
|
||||
vec2 c_br = uv - grid_edge_offset + vec2(cell_size, cell_size);
|
||||
float c_tl_dot = c_dot(uv, c_tl);
|
||||
float c_tr_dot = c_dot(uv, c_tr);
|
||||
float c_bl_dot = c_dot(uv, c_bl);
|
||||
float c_br_dot = c_dot(uv, c_br);
|
||||
|
||||
// the uv within the tile (0 to 1)
|
||||
vec2 tile_uv = (uv - c_tl) / cell_size;
|
||||
|
||||
// lerp index
|
||||
float u = fade(tile_uv.x);
|
||||
float v = fade(tile_uv.y);
|
||||
//float u = tile_uv.x;
|
||||
//float v = tile_uv.y;
|
||||
//float u = smoothstep(0, 1, tile_uv.x);
|
||||
//float v = smoothstep(0, 1, tile_uv.y);
|
||||
//float val = smoothstep(tile_uv.x, smoothstep(tile_uv.y, c_bl_dot, c_tl_dot), smoothstep(tile_uv.y, c_br_dot, c_tr_dot));
|
||||
float val = lerp(lerp(c_tl_dot, c_bl_dot, v), lerp(c_tr_dot, c_br_dot, v), u);
|
||||
//float val = tile_uv.y;
|
||||
//float val = c_bl_dot*2 + 0.5;
|
||||
//val = val * 20;
|
||||
float out_val = val /2.0 + 0.5;
|
||||
color = vec4(out_val, out_val, out_val, 1.0);
|
||||
|
||||
//float yes = 0.5 + (c_dot(uv, c_tl) + c_dot(uv, c_tr) + c_dot(uv, c_bl) + c_dot(uv, c_br)) / 2;
|
||||
//FragColor = vec4(yes, yes, yes, 1);
|
||||
}
|
||||
|
||||
//#version 320 es
|
||||
//precision mediump float;
|
||||
//layout(location = 0) out vec4 outColor;
|
||||
//
|
||||
//void main() {
|
||||
// // We'll make origin in the top-left.
|
||||
// vec2 uv = gl_FragCoord.xy / WindowSize;
|
||||
// uv.y = 1.0 - uv.y;
|
||||
// vec2 grid_edge_offset = mod(uv, cell_size);
|
||||
// // c: corner
|
||||
// vec2 c_tl = uv - grid_edge_offset;
|
||||
// vec2 c_tr = uv - grid_edge_offset + vec2(cell_size, 0);
|
||||
// vec2 c_bl = uv - grid_edge_offset + vec2(0, cell_size);
|
||||
// vec2 c_br = uv - grid_edge_offset + vec2(cell_size, cell_size);
|
||||
// float c_tl_dot = c_dot(uv, c_tl);
|
||||
// float c_tr_dot = c_dot(uv, c_tr);
|
||||
// float c_bl_dot = c_dot(uv, c_bl);
|
||||
// float c_br_dot = c_dot(uv, c_br);
|
||||
//
|
||||
// // the uv within the tile (0 to 1)
|
||||
// vec2 tile_uv = (uv - c_tl) / cell_size;
|
||||
//
|
||||
// // lerp index
|
||||
// float u = fade(tile_uv.x);
|
||||
// float v = fade(tile_uv.y);
|
||||
// //float u = tile_uv.x;
|
||||
// //float v = tile_uv.y;
|
||||
// //float u = smoothstep(0, 1, tile_uv.x);
|
||||
// //float v = smoothstep(0, 1, tile_uv.y);
|
||||
// //float val = smoothstep(tile_uv.x, smoothstep(tile_uv.y, c_bl_dot, c_tl_dot), smoothstep(tile_uv.y, c_br_dot, c_tr_dot));
|
||||
// float val = lerp(lerp(c_tl_dot, c_bl_dot, v), lerp(c_tr_dot, c_br_dot, v), u);
|
||||
// //float val = tile_uv.y;
|
||||
// //float val = c_bl_dot*2 + 0.5;
|
||||
// //val = val * 20;
|
||||
// float out_val = val /2 + 0.5;
|
||||
// FragColor = vec4(out_val, out_val, out_val, 1);
|
||||
//
|
||||
// //float yes = 0.5 + (c_dot(uv, c_tl) + c_dot(uv, c_tr) + c_dot(uv, c_bl) + c_dot(uv, c_br)) / 2;
|
||||
// //FragColor = vec4(yes, yes, yes, 1);
|
||||
// outColor = vec4(1.0, 0.0, 0.0, 1.0);
|
||||
//}
|
||||
|
|
|
|||
105
main.c
105
main.c
|
|
@ -99,11 +99,18 @@ GLuint compile_shader(GLuint type, const char *src) {
|
|||
}
|
||||
|
||||
const char *vertex_shader_src =
|
||||
"attribute vec4 vPosition; \n"
|
||||
"void main() \n"
|
||||
"{ \n"
|
||||
" gl_Position = vPosition; \n"
|
||||
"} \n";
|
||||
//"attribute vec4 vPosition; \n"
|
||||
//"void main() \n"
|
||||
//"{ \n"
|
||||
//" gl_Position = vPosition; \n"
|
||||
//"} \n";
|
||||
"#version 320 es\n"
|
||||
"\n"
|
||||
"layout(location = 0) in vec2 aPos;\n"
|
||||
"\n"
|
||||
"void main() {\n"
|
||||
" gl_Position = vec4(aPos, 0.0, 1.0);\n"
|
||||
"}\n";
|
||||
|
||||
/// returns 0 if failed.
|
||||
GLuint create_shader(const char *fragment_src) {
|
||||
|
|
@ -137,20 +144,20 @@ GLuint load_shader(const char *path) {
|
|||
|
||||
GLuint shader = create_shader(string);
|
||||
|
||||
if (shader == 0) {
|
||||
// print file
|
||||
int line_count = 1;
|
||||
printf("%i\t", line_count);
|
||||
line_count++;
|
||||
for (int i = 0; i < length; i++) {
|
||||
printf("%c", string[i]);
|
||||
if (string[i] == '\n') {
|
||||
printf("%i\t", line_count);
|
||||
line_count++;
|
||||
}
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
//if (shader == 0) {
|
||||
// // print file
|
||||
// int line_count = 1;
|
||||
// printf("%i\t", line_count);
|
||||
// line_count++;
|
||||
// for (int i = 0; i < length; i++) {
|
||||
// printf("%c", string[i]);
|
||||
// if (string[i] == '\n') {
|
||||
// printf("%i\t", line_count);
|
||||
// line_count++;
|
||||
// }
|
||||
// }
|
||||
// printf("\n");
|
||||
//}
|
||||
|
||||
free(string);
|
||||
return shader;
|
||||
|
|
@ -208,6 +215,41 @@ SDL_Log("GL_RENDERER: %s", renderer);
|
|||
|
||||
GLuint shader = load_shader("fragment.glsl"); //create_shader(fragment_shader_source);
|
||||
|
||||
|
||||
// buffers
|
||||
// Load the vertex data
|
||||
GLfloat vertices[] = {
|
||||
-1.0, 1.0,
|
||||
-1.0, -1.0,
|
||||
1.0, -1.0,
|
||||
|
||||
1.0, -1.0,
|
||||
1.0, 1.0,
|
||||
-1.0, 1.0,
|
||||
};
|
||||
GLuint vao, vbo;
|
||||
glGenVertexArrays(1, &vao);
|
||||
glBindVertexArray(vao);
|
||||
glGenBuffers(1, &vbo);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, vbo);
|
||||
glBufferData(GL_ARRAY_BUFFER,
|
||||
sizeof(vertices),
|
||||
vertices,
|
||||
GL_STATIC_DRAW);
|
||||
|
||||
glEnableVertexAttribArray(0);
|
||||
glVertexAttribPointer(
|
||||
0, // location
|
||||
2, // vec2
|
||||
GL_FLOAT,
|
||||
GL_FALSE,
|
||||
0,
|
||||
(void *)0
|
||||
);
|
||||
|
||||
|
||||
|
||||
|
||||
int w, h;
|
||||
double time;
|
||||
while (running) {
|
||||
|
|
@ -228,22 +270,19 @@ SDL_Log("GL_RENDERER: %s", renderer);
|
|||
// Shader parameters.
|
||||
glUseProgram(shader);
|
||||
|
||||
//int uniform_WindowSize = glGetUniformLocation(shader, "WindowSize");
|
||||
//glUniform2f(uniform_WindowSize, w, h);
|
||||
int uniform_WindowSize = glGetUniformLocation(shader, "WindowSize");
|
||||
glUniform2f(uniform_WindowSize, w, h);
|
||||
|
||||
//time = time_since_start();
|
||||
//int uniform_time = glGetUniformLocation(shader, "time");
|
||||
//glUniform1f(uniform_time, (float)time);
|
||||
time = time_since_start();
|
||||
int uniform_time = glGetUniformLocation(shader, "time");
|
||||
glUniform1f(uniform_time, (float)time);
|
||||
|
||||
// Load the vertex data
|
||||
GLfloat vVertices[] = {
|
||||
0.0f, 0.5f, 0.0f,
|
||||
-0.5f, -0.5f, 0.0f,
|
||||
0.5f, -0.5f, 0.0f
|
||||
};
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, vVertices);
|
||||
glEnableVertexAttribArray(0);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 3);
|
||||
//glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, vVertices);
|
||||
//glEnableVertexAttribArray(0);
|
||||
//glDrawArrays(GL_TRIANGLES, 0, 6);
|
||||
|
||||
glBindVertexArray(vao);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 6);
|
||||
|
||||
SDL_GL_SwapWindow(window);
|
||||
checkGlError();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue