josh/d-derelict-sdl2-gl3-gl3n-glamour-demo
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make quad spin

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This commit is contained in:
Josh Holtrop 2013-10-28 23:13:31 -04:00
parent ec149216ff
commit 6779466792
1 changed files with 9 additions and 1 deletions
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10
source/app.d
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@ -4,12 +4,15 @@ import derelict.opengl3.gl3;
import glamour.vao;
import glamour.shader;
import glamour.vbo;
import gl3n.linalg;
enum int WIDTH = 800;
enum int HEIGHT = 600;
GLint position_idx;
GLint color_idx;
GLint view_idx;
mat4 view_matrix;
void init()
{
@ -17,12 +20,13 @@ void init()
glViewport(0, 0, WIDTH, HEIGHT);
immutable string shader_src = `
vertex:
uniform mat4 view;
in vec2 position;
in vec3 color;
out vec3 color_i;
void main(void)
{
gl_Position = vec4(position, 0.0, 1.0);
gl_Position = view * vec4(position, 0.0, 1.0);
color_i = color;
}
fragment:
@ -50,12 +54,16 @@ fragment:
glVertexAttribPointer(color_idx, 3, GL_FLOAT, GL_FALSE, 0, null);
ElementBuffer ibo = new ElementBuffer(indices);
ibo.bind();
view_idx = program.get_uniform_location("view");
}
void display(SDL_Window * window)
{
glClear(GL_COLOR_BUFFER_BIT);
view_matrix.make_identity();
view_matrix.rotate(SDL_GetTicks() / 500.0, vec3(0.0, 0.0, 1.0));
glUniformMatrix4fv(view_idx, 1, GL_TRUE, view_matrix.value_ptr);
glDrawElements(GL_TRIANGLE_FAN, 4, GL_UNSIGNED_SHORT, null);
SDL_GL_SwapWindow(window);